Stack books of different sizes into a tower, aiming for the tallest structure that still stands. Push the design toward the edge of stability on purpose — an off-center stack that just barely holds is more satisfying than a perfectly straight one.
What you need
- books of varying sizes
How to do it
- 1Gather a stack of books in different sizes and shapes.
- 2"How tall can we go before it falls?" Start with the largest book as a base.
- 3Add books one at a time, largest to smallest, adjusting position to keep it balanced.
- 4See how far off-center the stack can lean before it finally topples, then measure and try to beat it.
Variations
- If books alone feel limited: mix in small boxes or blocks for more shape variety.
- How it ends: measuring the final height with a tape measure or a hand-span gives a satisfying, quantifiable result.
💡 Parent tip
Let the tower fall loudly and often — the falling is not a failure, it's the feedback that makes the next attempt better.
What your child develops
- Balance and centre of gravity — direct, hands-on experience with a real physics concept
- Fine motor precision — small adjustments to keep a stack from tipping
- Risk assessment in a safe context — deciding how far to push a stack before it fails
Safety notes
- Keep stacks away from anywhere a falling book could hit a face or hand at close range.
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