our boat is made of Styrofoam, tin foil, popsicle sticks, Styrofoam cup. Our boat went about 7 seconds. One of our good ideas was putting tin foil on the bottom of the boat. We then added after that we put paper in front of the styrofoam cup and put straw around the styrofoam. A couple bad ideas we had were putting a bunch of hot glue on the boat. Overall our boat was fairly descent boat