Respect the Laws of Physics, please, by utilizing these fun and informative demos. Could the Magnetic Accelerator be the basis of a perpetual motion machine? Great for open-ended discovery. What better way for your students to visually understand Sir Isaac Newton's idea of F=ma, than to drop a 1 Newton foam apple onto someone's head? Solve the mystery of why cats always land on their feet. Perfect for teaching your students about Newton's laws of motion, Newton's Cradle makes a great addition to any classroom.