Magnetic Intruder Alarm Technology Primo Toys Swarmy Swamp Adventure

Primo Toys Swarmy Swamp Adventure Pack

Features for fuss-free building – This 4+ set comes with Starter Bricks to get kids building fast

is guaranteed to be an absolute crowd pleaser

The LEGO® City Gaming Tournament Truck (60388) is loaded with features for imaginative play

Magnetic Intruder Alarm Technology Primo Toys Swarmy Swamp AdventureDon'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.