Make a boat that floats. Rules: You must only use a 30cm x 30cm square of aluminium foil, nothing else! You must put enough water in to sink/tub so that the boat will become fully submerged. You cannot hold the boat up once you start adding weight. See how many pegs your boat can hold. If you run out of pegs, get creative with the weights you put on. Either take a timelapse video or take a photo of the floating boat with the weight on it. Try another design to see if it will hold more weight. Click on to upload your results.