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4M Spy Science - Intruder Alarm

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4M Spy Science - Intruder Alarm

Learn the science of connecting an electric circuit.

Construct your own door buzzer and place it behind your door.

Stop intruders from your room. It's cool and fun!

Contains: plastic platform and alarm casing,

1 set of plastic accessories, metal pegs, electric buzzer, electric wire, string for alarm trigger, and detailed instructions.

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