In this experiment,
You can experiment with a heavy golf ball and a light table tennis ball.
Put the golf ball down and put a ping-pong ball on it, hold it by hand, and release it at the same time. The golf ball first touches the floor. While the golf ball jumps up, it crashes with the table tennis ball.
A ping pong ball absorbs a significant amount of momentum of the golf ball after a collision. With this energy, the table tennis ball jumps high.