With this cool little how-to, learn about Newton's laws of motion and try first hand to see centripetal force in action. You'll need balloons and a coin and a lug nut.
Learning about Newton's Laws of Motion is anything but boring. Grab a clear balloon and a penny and learn about interia and centripetal force (that's right... it's centripetal - not centrifugal). Once you've mastered the Spinning Penny demo, you'll need to move Netwon's Waiter Tray - a spinning tray of glasses. As you'll see in this video, everything went just fine until the spinning waiter's tray accidentally hit the lady's leg... and then the demo turned into flying glasses of water!