The first exercise

Starting with the ball drops, then the ball will hit on the seesaw, which it consisted of board and the supported board. I put a box at the other side of the seesaw which I called it "bullet". when the ball hit on the seesaw, the "bullet" will jump up to the stone step, and then it is a dominos effect. After hitting the last board in the dominos then it will fell on the second seesaw, then there was a small mass box on the seesaw and it will eject to hit on the steel plate. After hitting the steel plate, it will fell on the ground and because of the bouncy of box, the box will eject again immediately to hit the snooker on the ground.