Build your own custom alarms with logiblocs! 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. Recommended for ages 5 years and up and requires three AAA batteries (not included).