With this exercise, I wanted to incorporate and work with more part provided by the physical computing lab. I ended up making a toy the is able to hit the marble side to side. It consists of a middle cross that is serves as the center piece and two trapazoid parts the support the structure. The middle cross has two ball bearings attached and is held up with a shoulder screw as its axis. There is a magnet in the middle of the bottom part to add some more motion to the toy. You could play with the toy and multiple ways.