Magnetic Intruder Alarm Technology Expand the fun – The

Expand the fun – The huge range of LEGO® Marvel collect-and-combine building toys inspire young imaginations with innovative features and endless build-and-play possibilities

But do not forget about the defense system against inconsistent insertition

Move various mechanisms to get to the secret compartment

Primo Toys Swarmy Swamp Adventure Pack

Magnetic Intruder Alarm Technology Expand the fun – TheDon'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.