Science · Stage 4
Design: Keep a Drink Warm
Trap the heat! Plan, build and test a cosy wrap that keeps a hot drink warm.
✦ Science📘 Stage 4 · S4⏱ ~10 min🧒 Ages 8–9★ Free to start
apply what we know about design: keep a drink warm to everyday life.
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Kavi's Cooling Cocoa
Kavi makes a steamy hot cocoa ☕ — but by the time the story is over, it has gone cold and sad. "I need to trap the heat," hoots Kavi. "If I wrap my mug in a material that holds air, like wool or cloth, the heat escapes slowly. Let's plan, build and test a warm-keeper like a real designer!"
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What your child will learn
1Bare mug, or wrapped mug?Two mugs start with the same hot drink. Tap each card — which one stays warm longer?
2Which keeps more heat in?Predict, then tap to test it. Think about what traps air! Tap Next test for more.
3Keeps it warm, or lets heat escape?Some materials trap air and hold the heat in. Others let it escape fast. Tap the right box!
4A good warm-keeper has…Use what you've learned! Tap each part to see how it keeps the heat in.
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A peek inside
Kavi has a hot cocoa ☕. Which stays warmer — a bare mug, or a mug wrapped in a woolly scarf 🧣?
A wool wrap traps air around the mug, so the heat escapes slowly.
Try this at home: Why does wrapping a mug help keep the drink warm?
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Science · Stage 4 · S4 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.