Materials: Ping-pong balls, 15 straws, 10 toothpicks, Wallpaper trough or some basin filled with water, 12 inches of masking tape, 2 sheets 8-1/2 x 11 paper, scissors (may not be part of objects).
You must build an object using the provided materials. This object must move across the basin of water propelled by air. The object will receive bonus points for transporting ping-pong balls. You receive 10 points for each lap across the basin. Each ping-pong ball that is on the object at the end of the time earns 7 points. You have 5 minutes to design and build your object and 2 minutes to propel your object