Boomilever

Hold 15 kg of sand with the chain 40 to 45 cm out from a wall, using as little wood as possible. This build lab walks you around the loop that gets you there: design it, build it precisely, test it until it breaks, write down what happened, and make the next one lighter.

Work through the five phases in order. Mark each sheet done as you finish it.

The calculators and explorers from the sheets, one tap away.

Look up the rules that shape your design and how to set up a test.