Teach your child about physics and science in general with this EISCO Ring Thrower - Includes 2 Aluminum Rings set. This ring thrower kit is ideal for performing physics experiments including the study of electromagnetism Eddy Currents Lenz Law and Faraday s Law. When the aluminum rings are placed on the coil the changing magnetic field introduces an electric current which sends the rings into the air. This physics experiment kit makes an exciting and interesting experiment for students and teachers or even at home. The ring thrower device measures 12.5 tall and sits on a base that is 6.25 in diameter. This EISCO Ring Thrower - Includes 2 Aluminum Rings set includes two aluminum rings that each measure 2 in diameter and are 1 tall. Use it to further your child s education and stimulate a lifelong interest in science nature and physics.