Fizzing Snowman Science Experiment for Kids (Winter Science Fun!)
This post may contain affiliate links.
Need a winter science activity that works with or without real snow?
These Fizzing Snowmen are an easy, messy, sensory-rich STEM project made from just three common ingredients. Kids get to mix, mold, build, and then watch their snowmen fizz and foam in a big, bubbly reaction. It’s perfect for indoor winter play, preschool science, early STEM lessons, or a cozy snow-day activity.
This one always gets big reactions—literally!
This is a great big messy concoction, but will certainly entertain and excite your kids!
Supplies You Need
Only 3 main ingredients:
-
Shaving cream (the classic foamy kind)
-
White vinegar
-
A large tray or sensory bin
Optional extras:
-
Scoops, spoons, bowls
-
Glitter (iridescent looks like snow!)
-
Buttons or googly eyes (remove before fizzing)
-
Droppers or squeeze bottles for the vinegar
How to Make Fizzing Snowmen Dough
1. Combine baking soda + shaving cream
Pour a full box (or a few cups) of baking soda into a large mixing bowl.
Add shaving cream a little at a time until the mixture becomes a soft, moldable, squishy dough—similar to cold, packable snow.
Kids LOVE this part, and it’s a fantastic sensory experience.
2. Mix with hands
Let kids dive in and squeeze, knead, and squish until the dough comes together.
It should hold its shape when pressed or rolled.
If it feels too crumbly → add more shaving cream.
Too wet → add more baking soda.
3. Build your snowmen
Form snowballs and stack them into snowmen on a tray.
Kids can add:
-
Buttons
-
Beads
-
Small twigs
-
Tiny hats
Or skip decorations entirely and enjoy the simple fizzing snowballs.
Once it was dough-like, they shaped them into snowballs and made snowmen on the tray. My kids loved making them into balls of “snow”.
4. Time for the chemical reaction!
Pour or drip white vinegar over the snowmen and watch them erupt in foamy bubbles.
The more vinegar, the frothier the snowstorm!
If possible, give kids droppers or squeeze bottles to extend the play and control the reaction.
Why Do Fizzing Snowmen Work? (Kid-Friendly Science)
This experiment is a classic acid + base reaction:
-
Baking soda = a base
-
Vinegar = an acid
-
When combined, they create carbon dioxide gas → the bubbles and fizzing you see!
The shaving cream gives the mixture structure, allowing kids to mold snowballs that still react dramatically.
This is a great introduction to:
-
Chemical reactions
-
Gas formation
-
States of matter
-
Cause and effect
-
Sensory science
Perfect for preschool through early elementary.
Tips for Less Mess (or More!)
-
Do the fizzing stage outside or in a bathtub if you want easy cleanup.
-
Use droppers or pipettes to slow down the fizzing (extends the experiment!).
-
Add blue or silver glitter for a magical “snow sparkle.”
-
Freeze the snow dough for 10–15 minutes for a chilly version.
Optional Extension Activities
Turn this activity into a winter mini-lesson:
• Snowman engineering
Challenge kids to build the tallest snowman that doesn’t topple.
• States of matter discussion
Talk about solids (snow dough), liquids (vinegar), and gases (CO₂ bubbles).
• Counting & math add-ons
Add buttons or pom-poms and count them before dissolving.
It fizzed and foamed more than we expected!
It created beautiful, messy memories!
See More Winter Activities for Kids:
Winter Math: Snowman Fractions
Winter Craft ~ Watercolor and Salt Snowflakes
Snowstorm in a Jar: Easy Winter Science Activity for Kids
This activity is inspired by the book The Snowy Day by Ezra Jack Keats. Have you read this book? I adore it! It reminds me a lot of my own son and how he plays in the snow.
See what other educators have shared with the SNOW theme:
Snow Themed Alphabet Sensory Bin – The Educators’ Spin On It
Snowball Name Fight – Rainy Day Mum
Snowball Number Recognition Game – School Time Snippets
Bring In the Snow! – Mama Smiles
Snowstorm in a Bag- JDaniel4’s Mom
Snowy Day Sticky Table for Toddlers- Toddler Approved
Easy Winter Toddler Art – Messy Little Monster
Snow Science Explorations – Inspiration Laboratories
Painting in the Snow with 3 Ingredient Snow Paint- Views From a Step Stool
