A classic! A vivid demonstration of Newton’s second law of motion that students will never forget. Aim a stun dart directly at a monkey sitting in a tree. The monkey jumps from the tree branch just as the dart is released. Will the dart hit the falling monkey or sail over the monkey’s head? This apparatus is easy to set up. Tie a metal-tipped dart to a unique release mechanism connected to the backboard. Pull the dart back to stretch the elastic band. Aim the dart at the foam monkey. Release the dart and the foam monkey drops immediately. No electromagnet switches or air guns needed. The demonstration can be repeated in less than a minute so when students ask to see it again and again, setup is no problem. Assembly is required and complete instructions are included.