Kids discover the wonders of electricity with this great kit containing everything they need to build a real doorbell without using any tools. It includes a transistor, resistors, a transducer, an Led, connector wires and springs, and a push button. All parents need to provide is a 9-volt battery.
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Kids discover the wonders of electricity with this great kit containing everything they need to build a real doorbell without using any tools. It includes a transistor, resistors, a transducer, an Led, connector wires and springs, and a push button. All parents need to provide is a 9-volt battery.
Read Less
