Uploaded April 2012 | Updated September 2026, 2 weeks ago

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Have your students experience the difference between gravitational and elastic potential energy. Invert a Dropper Popper, place a ping pong ball inside the cavity, and drop the Popper onto a hard surface with the ping pong ball on top... Available from Educational Innovations, Inc. at teachersource.com/product/dropper-popper/energy