Science · Stage 5

Engineering a Solution

Start with a user and their need, set the criteria, then plan, build and test a model — and evaluate it against every check.

✦ Science📘 Stage 5 · S5⏱ ~10 min🧒 Ages 9–10★ Free to start

I can plan, build and evaluate a working model that meets a user's need.

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Kavi's Bridge for Grandpa

Kavi spots Grandpa Owl 🦉 stuck on the far bank of the stream — he needs to cross safely to get home, but there is no bridge. "That's a real need!" hoots Kavi. "An engineer starts with the person and their problem. I'll plan a bridge, build a model, then test it — it must reach both banks and hold Grandpa. If a check fails, I'll improve one thing and test again!"

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What your child will learn

1A model starts with a user and a needBefore building anything, an engineer asks: who needs this, and what must it do? Those answers become the brief. Tap each part.

2The engineering design cycleEngineers work in a loop: plan, build, test, then evaluate against the criteria. If a criterion is missed, improve ONE thing and go round again. Tap each step.

3Does the model pass — or improve it?After each test, evaluate the model against ALL its criteria. Meets every one → done. Misses any → improve one thing and test again. Predict, then tap to check! Tap Next test for more.

4Why the second model holds the weightKavi changed ONE thing after evaluating the first model. Tap each card to see the before and after.

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A peek inside

Kavi's brief: build a model bridge so Grandpa can cross the stream. Criteria: it must reach both banks AND hold Grandpa. Kavi tested the first model — it reached across, but it sagged and dropped him. Pass it, or improve it?

Check every criterion. Reached both banks ✓, but did NOT hold Grandpa ✗ — one criterion failed, so the model is not finished.

Try this at home: An engineer starts with a user and a need. In Kavi's challenge, who is the user and what is the need?

Ready to play and learn?

Start the free interactive lesson, or print the handout for screen-free play.

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Part of Science · Stage 5 · S5 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.