Dowling Magnets Electromagnet Set

Build a doorbell, telegraph system and even a catapult all using a true electromagnet. Kit includes: disc, latch and neodymium magnets, compass, straws, wires, sand paper, switch plates, wood screws, nails, light bulbs, battery holders, iron filings, pre-drilled wood blocks, light emitting diode (LED) and experiment and project book.