4M Science - Doorbell Making
Learn about electromagnetism and transform a metal screw into a magnetic hammer with the 4M Doorbell Making Kit. Complete an electric circuit to construct this handy doorbell - great in your room as a cool science gadget. Includes: a base board, bell, coil cover, L-shaped cover, battery cover, hammer, coil, accessories and detailed instructions. Also required: 2 x AA batteries and a small crosshead screwdriver (not included). Age 8+ years. Part of the KidzLabs range. Distributed in New Zealand by Holdson.