We chose to use foil, stirafoam, a note card, and a few other floatable objects for our boat. We used the stirafoam as the base, and foil for the edges to keep the main part of the boat light so it would go fast. We used a stiff notecard for the sail so the wind could easily catch it. One way we could have made it go fast or smoother is if we added a motor. ;)
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