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.

For orders shipped within New Zealand, please allow 2–3 business days for delivery.

New Zealand delivery only.

For more information please see: https://motat.shop/pages/shipping-information