4M KidzLabs - Magnetic Intruder Alarm fact Parts are pegged for extra

Parts are pegged for extra strength

Try to solve all 80 challenges

and push the down the handle to toast

Peep under waves and behind coral to discover hungry sharks

4M KidzLabs - Magnetic Intruder Alarm fact Parts are pegged for extraDon'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.