09/03/2026
Can spaghetti and marshmallows build a bridge strong enough to hold weight? Put your engineering skills to the test with this hands-on STEAM experiment.
For this challenge, all you need is uncooked spaghetti, mini marshmallows, two books or boxes, and a few small objects like coins or washers to test your bridge.
Try it yourself:
Connect spaghetti and marshmallows to create the basic shapes for your bridge.
Add triangles to help make your structure stronger and more stable.
Build two sides and connect them together to form your bridge.
Place your bridge across two books or boxes and make sure it can stand on its own.
Slowly add weight and see how much your bridge can support.
Look for weak spots, redesign your bridge, and test it again.
As you build, think like an engineer. Why do some shapes hold more weight than others? Where does the bridge begin to bend? What could you change to make it stronger?
This experiment brings science, engineering, and math together to show how forces, shapes, and smart structural design can turn simple materials into something surprisingly strong.
Build it. Test it. Improve it.