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24 days · ages 3–9 · flame-free

The December plan

Christmas Science Experiments for Kids

24 easy, flame-free experiments, one for every day from December 1 to Christmas Eve. Each one comes with a cozy story about Theo the Science Elf and his little sister Tilda, and uses things you already have in your kitchen.

  • Ages 3–9
  • Kitchen materials
  • No printer needed
  • Made by a physicist
Real photo: the Milk Fireworks experiment
DECEMBER 1Milk Fireworks
Real photo: the Magic Snow experiment
DECEMBER 2Magic Snow
Real photo: the Lava Lamp experiment
DECEMBER 3Lava Lamp

The short answer

  • The easiest Christmas science experiments for children aged 3 to 9 use things from your kitchen: milk and dish soap, cornstarch, baking soda and vinegar, candy, balloons, cups and jars.
  • Do one small experiment a day from December 1 to 24, always together with a grown-up. All 24 experiments in the plan below are flame-free.
  • Each day has a short read-aloud story, one experiment, and a few questions to talk about what happened.
  • The first 5 days are free, and each has its own page: Milk Fireworks, Magic Snow, Lava Lamp, Candy Rainbow and Foam Mountain.

Made with love for

  • Parents
  • Grandparents
  • Homeschoolers
  • Preschool teachers
  • Kindergarten teachers
  • Early elementary teachers
Your 24-day December plan

24 days, 24 little experiments

Tap a door to meet Theo and Tilda, tap again to see Janka’s real photo of the experiment, and once more to close it. Days 1 to 5 are free, with a full page each.

  1. December 1: Theo and Tilda’s Milk Fireworks adventureFREEDEC1Milk FireworksGratitude
    Real photo of the Milk Fireworks experiment from Janka’s lab
    December 1 · Flame-freeMilk FireworksWatch one drop of soap send colors racing across milk.Surface tension · Mixing and dissolvingFull experiment, free
  2. December 2: Theo and Tilda’s Magic Snow adventureFREEDEC2Magic SnowPatience
    Real photo of the Magic Snow experiment from Janka’s lab
    December 2 · Flame-freeMagic SnowDiscover a goo that flows like a liquid but pushes back like a solid.Amazing materials · Forces and motionFull experiment, free
  3. December 3: Theo and Tilda’s Lava Lamp adventureFREEDEC3Lava LampEmpathy
    Real photo of the Lava Lamp experiment from Janka’s lab
    December 3 · Flame-freeLava LampWatch gas bubbles lift colored blobs up through oil.Density and floating · Chemical reactionsFull experiment, free
  4. December 4: Theo and Tilda’s Candy Rainbow adventureFREEDEC4Candy RainbowAcceptance
    Real photo of the Candy Rainbow experiment from Janka’s lab
    December 4 · Flame-freeCandy RainbowWatch candy colors dissolve and spread into a star.Mixing and dissolving · Density and floatingFull experiment, free
  5. December 5: Theo and Tilda’s Foam Mountain adventureFREEDEC5Foam MountainTeamwork
    Real photo of the Foam Mountain experiment from Janka’s lab
    December 5 · Flame-freeFoam MountainWatch baking soda and vinegar build a mountain of foam.Chemical reactions · Acids and basesFull experiment, free
  6. December 6: Theo and Tilda’s Giant Gummy Bear adventureDEC6Giant Gummy BearPatience
    Real photo of the Giant Gummy Bear experiment from Janka’s lab
    December 6 · Flame-freeGiant Gummy BearWatch a gummy bear soak up water and grow overnight.Mixing and dissolving · Water on the moveIn the book
  7. December 7: Theo and Tilda’s Pepper Skaters adventureDEC7Pepper SkatersEmpathy
    Real photo of the Pepper Skaters experiment from Janka’s lab
    December 7 · Flame-freePepper SkatersSee soap make pepper flakes zoom away across the water.Surface tensionIn the book
  8. December 8: Theo and Tilda’s Fizzing Mustard adventureDEC8Fizzing MustardGenerosity
    Real photo of the Fizzing Mustard experiment from Janka’s lab
    December 8 · Flame-freeFizzing MustardDiscover why mustard fizzes when it meets baking soda.Chemical reactions · Acids and basesIn the book
  9. December 9: Theo and Tilda’s Static Balloon adventureDEC9Static BalloonHelpfulness
    Real photo of the Static Balloon experiment from Janka’s lab
    December 9 · Flame-freeStatic BalloonDiscover how a rubbed balloon can make paper bits jump.ElectricityIn the book
  10. December 10: Theo and Tilda’s Floating Egg adventureDEC10Floating EggPerseverance
    Real photo of the Floating Egg experiment from Janka’s lab
    December 10 · Flame-freeFloating EggMake an egg float using nothing but salt water.Density and floatingIn the book
  11. December 11: Theo and Tilda’s Oil Droplets adventureDEC11Oil DropletsCooperation
    Real photo of the Oil Droplets experiment from Janka’s lab
    December 11 · Flame-freeOil DropletsSee why drops of color stay round and won’t mix with oil.Density and floating · Surface tensionIn the book
  12. December 12: Theo and Tilda’s Cola Geyser adventureDEC12Cola GeyserPerseverance
    Real photo of the Cola Geyser experiment from Janka’s lab
    December 12 · Flame-freeCola GeyserSee how bubbles of gas can blast cola high into the air.Air and gases · Mixing and dissolvingIn the book
  13. December 13: Theo and Tilda’s Cabbage Colors adventureDEC13Cabbage ColorsLearning from Mistakes
    Real photo of the Cabbage Colors experiment from Janka’s lab
    December 13 · A grown-up helpsCabbage ColorsTurn cabbage juice pink or blue to spot acids and bases.Acids and basesIn the book
  14. December 14: Theo and Tilda’s Self-Filling Balloon adventureDEC14Self-Filling BalloonTeamwork
    Real photo of the Self-Filling Balloon experiment from Janka’s lab
    December 14 · Flame-freeSelf-Filling BalloonSee how a fizzy reaction can blow up a balloon with no puffing.Chemical reactions · Air and gasesIn the book
  15. December 15: Theo and Tilda’s Melting Race adventureDEC15Melting RaceHonesty
    Real photo of the Melting Race experiment from Janka’s lab
    December 15 · Flame-freeMelting RaceFind out where ice melts faster: in plain or salty water.Melting and freezing · Density and floatingIn the book
  16. December 16: Theo and Tilda’s Liquid Tower adventureDEC16Liquid TowerLearning from Mistakes
    Real photo of the Liquid Tower experiment from Janka’s lab
    December 16 · Flame-freeLiquid TowerStack honey, soap, milk, and oil into four colorful layers.Density and floatingIn the book
  17. December 17: Theo and Tilda’s Pink Snow Cloud adventureDEC17Pink Snow CloudForgiveness
    Real photo of the Pink Snow Cloud experiment from Janka’s lab
    December 17 · Flame-freePink Snow CloudSee how egg white turns fizzing bubbles into a fluffy foam cloud.Chemical reactions · Acids and basesIn the book
  18. December 18: Theo and Tilda’s Unpoppable Balloon adventureDEC18Unpoppable BalloonCourage
    Real photo of the Unpoppable Balloon experiment from Janka’s lab
    December 18 · A grown-up helpsUnpoppable BalloonFind out how tape can stop a balloon from popping.Amazing materials · Air and gasesIn the book
  19. December 19: Theo and Tilda’s Bubble Snake adventureDEC19Bubble SnakeHelpfulness
    Real photo of the Bubble Snake experiment from Janka’s lab
    December 19 · A grown-up helpsBubble SnakeBlow a long snake of foam using a sock and a bottle.Surface tension · Air and gasesIn the book
  20. December 20: Theo and Tilda’s Cabbage Flowers adventureDEC20Cabbage FlowersEmpathy
    Real photo of the Cabbage Flowers experiment from Janka’s lab
    December 20 · A grown-up helpsCabbage FlowersDiscover how leaves drink colored water up through their veins.Water on the moveIn the book
  21. December 21: Theo and Tilda’s Fizzy Lemons adventureDEC21Fizzy LemonsAcceptance
    Real photo of the Fizzy Lemons experiment from Janka’s lab
    December 21 · A grown-up helpsFizzy LemonsDiscover how lemon juice and baking soda make colorful fizz.Acids and bases · Chemical reactionsIn the book
  22. December 22: Theo and Tilda’s Marbled Swirls adventureDEC22Marbled SwirlsLearning from Mistakes
    Real photo of the Marbled Swirls experiment from Janka’s lab
    December 22 · Flame-freeMarbled SwirlsSee a dab of soap send colors racing into marbled swirls.Surface tensionIn the book
  23. December 23: Theo and Tilda’s Balloon Fountain adventureDEC23Balloon FountainHelpfulness
    Real photo of the Balloon Fountain experiment from Janka’s lab
    December 23 · A grown-up helpsBalloon FountainSee how a balloon’s squeeze can push water up and out.Air and gases · Water on the moveIn the book
  24. December 24: Theo and Tilda’s Golden Snowfall adventureDEC24Golden SnowfallGratitude
    Real photo of the Golden Snowfall experiment from Janka’s lab
    December 24 · Flame-freeGolden SnowfallSee how tiny specks make a hidden beam of light glow gold.Light and colorIn the book

All 24 days, plus 27 more adventures for snowy January days.

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The adventure map

Light up a bauble for every adventure

A glowing two-page map waits at the start of the book. Each finished adventure lights up one bauble: 51 stops all the way to Christmas and beyond.

The two-page adventure map from the book, with 51 baubles to stamp
  1. 1Read the storyTheo the Science Elf and his little sister Tilda face a real-life problem and a big feeling. Just a few minutes to read aloud.
  2. 2Do the experimentEveryday kitchen materials, clear numbered steps, and a “What’s happening?” box that explains the science in kid-friendly words.
  3. 3Talk about itReady-made questions link the story’s value to your child’s own life. Then try the mini mission for the week.
  4. 4Stamp the mapEach finished adventure lights up a bauble on the two-page adventure map: 51 glowing stops all the way to Christmas!
Look inside

Flip through the real book

Turn the pages of the real book: Janka’s letters, the contents, the December plan, three full adventures, the real photos and the certificate. Click a page or swipe to turn it.

The cover: Janka in her lab with Theo and Tilda, and a line to write the child’s name
The adventure map, part 1: stops 1 to 25 to stamp or color
The adventure map, part 2: stops 26 to 51, all the way to Christmas
Welcome page for parents and teachers
A note from Janka for parents
A note from Janka for teachers and early years educators
Real photos from Janka’s lab
More real photos of the experiments
Behind the scenes: Janka’s award nights
Behind the scenes: science shows and Janka’s lab
About the author, Janka Sára Molnár, physicist
Junior Science Elf certificate
Meet Theo the Science Elf and his little sister Tilda
Why experimenting together matters
The values inside the stories
Contents
What we learn: science topics index
The 24-day December plan
Story page: A Sparkler of Colors in the Milk, the December 1 adventure about gratitude
Experiment page: Milk Fireworks, with the shopping list, steps and the science behind it
Story 8: The Candy Wreath’s Secret
Experiment 8: Candy Rainbow
Story 12: Magic Snow, Runny or Rock-Hard?
Experiment 12: Magic Snow
The Activity Pack cover: 64 extra printable pages
Back cover: thank you, little scientist
Front cover

A 26-page peek into the 129-page book · A4 and US Letter

The cover: Janka in her lab with Theo and Tilda, and a line to write the child’s name
The cover: Janka in her lab with Theo and Tilda, and a line to write the child’s name
The adventure map, part 1: stops 1 to 25 to stamp or color
The adventure map, part 1: stops 1 to 25 to stamp or color
The adventure map, part 2: stops 26 to 51, all the way to Christmas
The adventure map, part 2: stops 26 to 51, all the way to Christmas
Welcome page for parents and teachers
Welcome page for parents and teachers
A note from Janka for parents
A note from Janka for parents
A note from Janka for teachers and early years educators
A note from Janka for teachers and early years educators
Real photos from Janka’s lab
Real photos from Janka’s lab
More real photos of the experiments
More real photos of the experiments
Behind the scenes: Janka’s award nights
Behind the scenes: Janka’s award nights
Behind the scenes: science shows and Janka’s lab
Behind the scenes: science shows and Janka’s lab
About the author, Janka Sára Molnár, physicist
About the author, Janka Sára Molnár, physicist
Junior Science Elf certificate
Junior Science Elf certificate
Meet Theo the Science Elf and his little sister Tilda
Meet Theo the Science Elf and his little sister Tilda
Why experimenting together matters
Why experimenting together matters
The values inside the stories
The values inside the stories
Contents
Contents
What we learn: science topics index
What we learn: science topics index
The 24-day December plan
The 24-day December plan
Story page: A Sparkler of Colors in the Milk, the December 1 adventure about gratitude
Story page: A Sparkler of Colors in the Milk, the December 1 adventure about gratitude
Experiment page: Milk Fireworks, with the shopping list, steps and the science behind it
Experiment page: Milk Fireworks, with the shopping list, steps and the science behind it
Story 8: The Candy Wreath’s Secret
Story 8: The Candy Wreath’s Secret
Experiment 8: Candy Rainbow
Experiment 8: Candy Rainbow
Story 12: Magic Snow, Runny or Rock-Hard?
Story 12: Magic Snow, Runny or Rock-Hard?
Experiment 12: Magic Snow
Experiment 12: Magic Snow
The Activity Pack cover: 64 extra printable pages
The Activity Pack cover: 64 extra printable pages
Back cover: thank you, little scientist
Back cover: thank you, little scientist

Swipe to flip through · tap a page to see it big

That was 26 pages. The other 103 are just as cozy.

What children discover

14 science topics, one cozy December

Every experiment answers a real question about the world, in words a 3-year-old can follow and a 9-year-old can explain back. The numbers on the chips are December days.

  • Chemical reactions

    When two things mix and something brand-new is made.

    15 experiments in the book
    • 8Fizzing Mustard
    • 14Self-Filling Balloon
    • 21Fizzy Lemons
  • Acids and bases

    Sour acids meet baking soda: they fizz, foam, and change colors.

    7 experiments in the book
    • 8Fizzing Mustard
    • 13Cabbage Colors
    • 21Fizzy Lemons
  • Air and gases

    Air is real stuff: it pushes, fills, and lifts.

    14 experiments in the book
    • 12Cola Geyser
    • 18Unpoppable Balloon
    • 19Bubble Snake
  • Density and floating

    Why some things float while others sink.

    8 experiments in the book
    • 4Candy Rainbow
    • 15Melting Race
    • 10Floating Egg
  • Surface tension

    Water’s stretchy skin and how soap breaks it.

    6 experiments in the book
    • 19Bubble Snake
    • 1Milk Fireworks
    • 11Oil Droplets
  • Mixing and dissolving

    What disappears in water, and what never will.

    6 experiments in the book
    • 12Cola Geyser
    • 4Candy Rainbow
    • 1Milk Fireworks
  • Melting and freezing

    Ice, water, and vapor: matter changing state.

    5 experiments in the book
    • 15Melting Race
  • Heat and temperature

    What warmth does to air, water, and treats.

    8 experiments in the book
  • Fire and safe burning

    What a flame needs, and how to keep it safe.

    11 experiments in the book
  • Electricity

    Invisible charges that make things jump, and currents that make wires glow.

    2 experiments in the book
    • 9Static Balloon
  • Light and color

    Color mixing, glowing colors, and hidden pigments.

    3 experiments in the book
    • 24Golden Snowfall
  • Water on the move

    How water climbs, walks, and travels.

    4 experiments in the book
    • 6Giant Gummy Bear
    • 20Cabbage Flowers
    • 23Balloon Fountain
  • Forces and motion

    Pushes, pulls, and rockets on the move.

    4 experiments in the book
    • 2Magic Snow
  • Amazing materials

    Bouncy, gooey, stretchy: how materials behave.

    3 experiments in the book
    • 18Unpoppable Balloon
    • 2Magic Snow
  • Meet five topics this week, free

    Surface tension, chemical reactions, density, mixing and dissolving and amazing materials are all in the free 5 days.

    Get the free 5 days
Your December shopping list

What do you need for Christmas science?

Mostly things you already have. We counted every item in the 24 December experiments, so you can see what you’ll reach for most often.

No lab needed. 36 of the 51 experiments in the book need nothing but everyday kitchen and household items, not even a candle or a match.

Look inside the book
  • Cups, plates and bowls16 of 24 days
  • Water13 of 24 days
  • Food coloring11 of 24 days
  • Clear glasses and jars9 of 24 days
  • Dish soap6 of 24 days
  • Baking soda6 of 24 days
  • Safety goggles6 of 24 days
  • Vinegar4 of 24 days
  • Balloons4 of 24 days
  • Cotton swabs4 of 24 days
  • Cooking oil3 of 24 days
  • Milk3 of 24 days
  • Salt3 of 24 days
  • Candy3 of 24 days
  • Lemon juice2 of 24 days
  • Cornstarch1 of 24 days
Safety first

Is it safe for little scientists?

Yes. Every adventure was designed for small hands, busy kitchens, and preschool tables.

  1. 36 of the 51 experiments need nothing but everyday kitchen and household items. Not even a candle or a match.

  2. Every step that needs a grown-up is clearly marked, so you always know when to take over.

  3. A Safety First page and safety notes on every experiment, written in plain, friendly words.

  4. Designed and tested by a physicist who has run many science shows for children.

Read the full safety notes

Want to see how it works in your own kitchen?

A book page for the classroom: predict, try, seeThe 24-day December plan page
For preschool and school

Can teachers use the plan in class?

Yes. It’s made for preschool, kindergarten and early elementary groups too. Read the story at circle time, let the children predict what will happen, then do the experiment together.

  • Every adventure says what children will learn
  • Science words and value talk questions for each day
  • One purchase covers one teacher with their own group or class
  • A note for families, so children can continue at home
Janka Sára Molnár, physicist, at her lab table with a test-tube rocket
Who made this plan?

A physicist who tested every experiment

Janka Sára Molnár is a physicist and award-winning science communicator from Hungary. She started building particle detectors at 15, and for more than ten years she has been bringing science to children, families and teachers. She tested every experiment in the book in her own lab, and the photos are her real results.

Janka
Read Janka’s story
Launch prices

How much does it cost? Less than a hot cocoa.

Launch prices until December 24. Your files are ready the moment you check out.

The cover of Theo and Tilda’s Christmas Science Adventure

The Book

129 printable pages

$11.99Regular price $14.99

less than 50¢ a day in December

Get the book
  • 51 stories and 51 experiments
  • 24-day December plan
  • Story words and science words
  • Stampable two-page adventure map
  • Contents, learning index, and certificate
Best value
The cover of the Theo and Tilda Christmas Activity Pack

Book + Activity Pack

Everything in the book, plus 60+ pages of FUN

$13.99Regular price $17.99

less than 60¢ a day in December

Get the bundle
  • The complete book
  • Coloring pages, mazes, and word games
  • Puppets, ornaments, and bookmarks
  • Kindness advent calendar
  • Word cards and value talk cards

No printer? No problem. Read it on any tablet, phone or computer, and print only the pages you love.

One price for everyone. A parent can print it for Advent at home, and a preschool teacher can bring it to her group. One purchase covers one family, or one teacher with their own group or class.

Prices in US dollars. Any sales tax or VAT is calculated at checkout.

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Free sampler

Can we try it first?

Of course! The first 5 days of the December plan are yours for free. Try them at home or with your group, and see if your little scientist asks for Day 6.

  • 5 cozy stories
  • 5 kitchen experiments
  • 5 activity pages
  • A note from Janka
  • A cover with your name and the 5 experiments

No printer needed. Open it on a tablet or phone and start today.

FAQ

Questions grown-ups ask first

Everything parents and teachers ask before they start December. Tap a question to open it.

Still wondering?

Write to Janka. She reads every email herself.

molnar.janka.sara@funtasztikus-tudomany.hu
What is the easiest Christmas science experiment for a 3-year-old?

Milk Fireworks, Day 1 of the plan. Pour a little milk into a plate, add a few drops of food coloring, then touch the middle with a cotton swab dipped in dish soap. The colors swirl away from the soap, because the soap weakens the milk’s surface tension.

Do I need a printer?

No. Every story and experiment can be read on a tablet, phone or computer. Many families print only the adventure map, the activity pages and the certificate.

Is there a free version?

Yes. The first 5 days of the December plan are free as a 25-page sampler: Milk Fireworks, Magic Snow, the Lava Lamp, the Candy Rainbow and the Foam Mountain. Each one also has its own page on this site.

We are starting late. Does that matter?

Not at all. Begin with Day 1 anyway, or jump to today’s date. Both work, and the other 27 adventures in the book are for January, weekends and school breaks.

What do children learn from Christmas science experiments?

Every experiment answers a real question about the world, in words a 3-year-old can follow and a 9-year-old can explain back. Across the book children meet 14 science topics, from surface tension to static electricity, plus 14 values like patience and kindness.

Are the experiments safe for preschoolers?

Yes, when a grown-up stays close the whole time. All 24 December experiments are flame-free, every step that only a grown-up may do is clearly marked, and a Safety First page comes before the first experiment.

How much does the full book cost?

The book is $11.99 until December 24, then $14.99. The book with the 68-page Activity Pack is $13.99 until December 24, then $17.99. It is an instant PDF download.