4M - Magnetic Intruder Alarm

  • Brand: 4M
  • Reviews:

$28.95 $22.99
You Save $5.96!



Don't let anyone sneak into your room undetected! Build your own Intruder Alarm to keep out those pesky brothers & sisters! And while you are at it, explore how a magnet sets off this cool build-your-own intruder alarm. 

It's a great project for exploring how a magnetic switch works in an electric circuit.

Simple construction of the alarm box is required. 

Requires 2 x AAA batteries (not included).

Ages: 5+

(FSG3440)

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