I cut the exact same cuts out of acrylic, and it ended up flatter than I expected. Because the acrylic was thinner than the cardboard, I made a mistake, and the ball ended up coming out like an ellipsoid. Regardless, I secured the slices together, tied it with another cord, and the weight felt very pleasing.

Swinging it around created the momentum effect exactly as I had hoped, but the form was a bit strange and difficult to manage.

My next prototype, I wanted to 3D print, because it would allow me to create the form perfectly, and it would have more weight than the cardboard model.