Using just your breath, can you move a Ping-Pong ball from one cup to another?
The Setup: Line up two short cups in front of you, one right after the other. (Small cups work best -- just remember to hold them steady.) Drop a Ping-Pong ball into the cup nearest you.
The Trick: Take a deep breath! Now blow down the side of the Ping-Pong ball closest to you. Watch the ball jump up and into the other cup.
Why It Works: Blowing down the side of the ball creates a stream of compressed air. This stream of air pushes the ball up, forward, and into the second cup.