Build your own custom alarms with Logiblocs! Amaze your friends and family with a rain detector, a metal detector, a banana bleeper, and more! This STEAM science kit includes color coded, plug-and-play electronic building blocks, Each color coded with unique functions that can be combined to create custom circuits. This kit includes essential blocks to build a wide variety of smart circuits including an intruder alarm, metal detector and coin card. Change the input trigger and logic control to make your own gadgets.