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. The kit includes Essential blocks to build a wide variety of detectors and alarm systems, from an intruder alarm to a Morse code machine and more gadgets to use in daily life. Recommended for ages 5 years and up and requires three AAA batteries (not included).