Science · Stage 3
Investigate: Best Material for the Job
Some materials keep water out, some are strong — let's test them the fair way and pick the best one!
✦ Science📘 Stage 3 · S3⏱ ~10 min🧒 Ages 7–8★ Free to start
I can predict, then change one thing and keep the rest the same to make my test fair.
📖
Kavi Builds a Rainy-Day Roof
Rain is coming and Kavi's toy house has no roof! "Should I use paper or plastic?" Kavi wonders. "Paper looks nice, but does it keep the rain out?" Kavi smiles. "Let's test our materials for being waterproof and strong — and run a fair test by changing just one thing at a time!"
🎓
What your child will learn
1What can materials do?Every material has special powers. Tap each one to see what it is good for.
2Waterproof or soaks up water?Be the material scientist! Tap the right box for each one.
3How to run a fair testA fair test only changes ONE thing. Follow Kavi's steps — tap each one!
4Test it the fair wayGuess first, then tap to check. Tap Next test → for more!
🔍
A peek inside
Kavi needs a roof to keep a toy house dry in the rain 🌧️. Should Kavi use paper or plastic?
Plastic is waterproof, so the rain runs off. Paper soaks up water and goes soggy.
Try this at home: Name a material that is waterproof (keeps water out).
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Science · Stage 3 · S3 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.