The Choositz Decision Balls allow students to drop two identical looking balls from a height and they watch as one bounces and the other does not. They can observe the elasticity and kinetic energy converted to heat used in this demonstration.
SIUE STEM Resource Center
http://www.siuestemcenter.org/
Southern Illinois University Edwardsvillehttp://www.siuestemcenter.org/
Science East, Room 1276
Edwardsville, IL, 62026
USA
618-650-3065