In this challenge, you will build a machine that can send a ball (golf or ping pong) at least 12 inches.

Can you build a battery-operated, spinning motor-powered arm that can move ping pong balls across the room? Take the challenge!

Practice throwing overhand while properly positioning your body and going through "the full range of the throwing motion." This website links to PE Central Overhand Throwing Cues (which provides simple steps on overhand throwing), and...