The Knowhow Book of Batteries and Magnets (Know How Books)By Heather Amery
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- Author: Heather Amery
- Binding: Paperback
- Publisher: Brand: Edc Pub
- Published: 1988-05-01
Shows how to make games and models, bulbholders and switches, a toy lighthouse, lantern, Morse Code transmitter, robot, and electro-magnet.