- 10 green cups/10 ping-pong balls (from Game #6: Oh Christmas Tree)
With all 10 cups stacked together, bounce a ping-pong ball and catch it in the top cup. Move the cup AND the ball to the bottom of the stack. Continue catching ping-pong balls in the top cup and then moving that cup (with the ball) to the bottom of the stack. The stack of cups will get more and more wobbly making it harder to catch each successive ping-pong ball. This is a fun one...try it!