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.
Features:
- Simple construction of the alarm box is required.
- This magnetic alarm beeps when the door is opened to warn you of intruders.
- It's a fun project exploring how a magnetic switch works in an electric circuit.
- Requires 2Â x AAA batteries.
Suitable for ages 5Â years and up
