Snow Day Science Experiments for kids
Kitchen-cupboard experiments with a clear 'what's happening' explanation for the adult.
Part of Snow Day activities and all science experiments.
- Ages 3–535 min
Baking Soda Bubble Foam Eruption
Children pour vinegar into baking soda to make foam erupt in a tray.
Adult alongside · Some mess · Printable step card
- Ages 5–850 min
Density Tower in a Jar
Children layer liquids of different weights to build a standing column of visible layers.
Light adult help · Low mess · Printable step card
- Ages 8–1075 min
Paper Bridge Load Testing
Children design, build, and test paper bridges to find which structure holds the most weight.
Light adult help · Low mess · Printable step card
Snow Day Science Experiments at home
A full unplanned day at home with children who have higher-than-usual energy and nowhere to send it calls for something with a clear beginning, a middle that absorbs attention, and a visible end. Science experiments do that work better than almost anything else, because the activity itself provides the structure — there is a question, there is a test, there is a result — and the result generates conversation that extends the day further. These three experiments are built around that arc. They use nothing you need to buy, they produce something the child can look at and explain afterward, and they scale upward in complexity from a three-year-old who pours and watches to a ten-year-old who records data and argues about why one design beat another.
What is in this set
The three snow Day Science Experiments activities here run from 35 to 75 minutes — Baking Soda Bubble Foam Eruption is the quickest, Paper Bridge Load Testing the longest. Between them they cover ages 3–5, ages 5–8 and ages 8–10, and each card below says which. Each one wants an adult at least nearby.
Choosing one
Start with the age band: Baking Soda Bubble Foam Eruption for ages three to five, Density Tower in a Jar for five to eight, and Paper Bridge Load Testing for eight to ten. If you have mixed-age siblings and want one activity, the density tower is the most flexible — younger children can pour while older ones predict and explain. If you have an hour and need low mess, any of the three fits; if you need the longest runway, Paper Bridge Load Testing reliably runs seventy-five minutes or more. The foam eruption is the only one with genuine splash potential, so choose it when mess tolerance is high.
Before you start
For all three, do the measuring and pre-pouring before you call the children in — this removes the slow setup that loses attention. For the foam eruption, lay the towel and fill the pitcher. For the density tower, pour each liquid into its own labeled cup. For the bridge experiment, set the book-stack supports and count out the weights into a bowl. The one thing that tends to trip up all three experiments at once: children pour too fast. In each activity, slow pouring is what makes the result visible, and a quick reminder before the first pour saves most of the mess and most of the frustration.
More snow day activities
The other formats available for this theme.