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.
Ages 5 and over.
Typically, orders are dispatched within 24hrs (excluding weekends and NSW Public Holidays)
Free Standard Shipping for orders over $100
Flat Rate of $9.95 for orders under $100.
30 Day full exchange or money back (no fuss).
Shop safely and securely with our Level 1 PCI DSS Compliant payments system.
You may also like
Stay in touch!
Subscribe to our newsletter to get the inside scoop on new releases, exclusive offers and more.