Problem 4: Tumble-wood 
Divisions I, II, III & IV
Teams will design and build a structure made of only balsa wood and glue that will balance and support as much weight as possible. Before weight placement begins, the team will present a commercial that includes the structure rolling down a ramp. The structure will be scored for how far it rolls and for how much weight it holds. The team will integrate the placement of the weights into the performance.