Build a small bridge from craft sticks, either glued into a simple frame or woven without glue for a quick version, spanning a gap between two books or blocks. Test its strength by loading small coins or blocks onto it, one at a time, until it buckles.
What you need
- craft sticks
- glue (optional)
- small coins or blocks for testing
How to do it
- 1Set two books or blocks a short distance apart as the bridge's supports.
- 2Lay craft sticks across the gap, weaving or gluing them into a simple flat or lattice structure.
- 3"How much weight do you think it can hold?" Load coins or small blocks onto the middle, one at a time.
- 4Count how many it holds before it bends or breaks, then try a stronger design if there's time to rebuild.
Variations
- If glue drying time is a problem: a woven, glue-free version tests just as well and can be built and tested in one sitting.
- How it ends: recording the final weight it held (a number on paper) gives the build a clear, satisfying result.
💡 Parent tip
Let a design fail completely at least once — a bridge that visibly buckles teaches more than one that holds on the first try.
What your child develops
- Structural engineering basics — testing a real design against real load teaches how bridges work
- Fine motor precision — placing and weaving small sticks
- Quantitative thinking — counting how much weight a structure holds introduces measurement
Safety notes
- Supervise if using glue, especially near younger siblings who may put sticks in their mouths.
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