For our boat we decided to use all the tin foil,cups,and styrofoam to catch.Our first time for our race was 13.9 not the best not the worst.Our boat usually seemed to turn to the side for some reason slowing it down.We put a piece of paper as a sail to catch wind.We also put paper over the cup to increase the speed of the boat.the the blue thing on the front right of the boat is to keep the boat straight.