I use this product with a lesson in which I teach about various forces and motions (inertia, motion, forces, and friction). We learned what these words mean and then did an experiment by using 3 marbles and a ruler with an indent in the middle (like a mini ramp down the center of it) and a small bathroom sized cup at the end of the ruler. One marble sits at the opposite end and two sit directly in the center of the ruler. Students must make predictions about what will happen when they flick the 1st marble and later on may experiment with more marbles if time allows. They must make predictions and record their results.
Complete Lesson Plan (with Common Core Standards) is attached as well as the activity page