Build a spaghetti bridge
Take a leaf out of Isambard Kingdom Brunel's book and construct a bridge. Your challenge is to build it out of spaghetti but strong enough to support a 250g bag of sugar.
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Change states
Can you fit a hardboiled egg into a narrow-necked bottle? Find the answer out here.
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Create a marble run
Design engineers use cardboard for prototyping and early testing. You can be an engineer, too! Find a large box and turn it into a marble run.
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Build a geodesic dome
Richard Buckminster Fuller didn't use gumdrops and toothpicks to help construct his incredibly strong structures, but that's your challenge.
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