The Seismic Accelerator illustrates the laws of conservation of momentum and energy during the creation of a supernova. Several balls are threaded on a plastic shaft. When the apparatus is dropped straight downward onto a hard surface, the top ball can rebound to a height equal to five times the original drop. WOW! Leads into an interesting discussion of what's happened due to the Law of Conservation of Energy. Comes with safety glasses. Read more on our Blog!