Here’s a unit you’ll love to conduct and your students will be moooved by. A cow magnet is passed through the center of the magnetic induction board inducing current in the coil wire. The board is hooked up to a galvanometer to verify the current. As there is no other obvious power source, it must be the magnet! Developed by Brent Butler. Includes instructions. Grades 8 to 12. Size: 24.1 x 21.6 x 8.9 cm.