The up and down movement of that thing is only 1/2" or so. I'm pretty sure if I created a crank mechanism inside I could take full advantage of most of the space on the inside. I'll look into that next.
The little guy on top is also just a placeholder. I just wanted to see something bob up and down. What I think I'll actually replace it with is a Luigi drawing and having him stomp a goomba over and over again.
I'll finalize that soon. All in all, this is a project that can actually be mass produced with a pretty small amount of time. That makes me quite pleased. 4 pieces of 2" wood, 3 of which have a 3/16" hole drilled in the center. Have a 1" circular disc as the cam with a 1/8" dowel as the shaft. The moving piece is another 1/8" dowel attached to a board of sorts (in this case a popsicle stick).