After playing around with the print-in-place cannons my son asked for a target so we could turn our cannon shooting into a game with a clear goal and winner. Print a couple of cannons, balls and this target and go play a game.

The target features slightly raised separators so that the ball won't roll out.

I printed the top and bottom with a cartesian infill so it has a nice shine from an angle, a bit like a music record.