4M Toysmith, Logiblocs E-Building Blocks System Alarms & Door Bell Kids Science Kit

Build over 10 custom circuit systems using logiblocs alarms & door bell Kit Plug-and-play electronic building blocks, Each color coded with unique functions to create custom Circuits to build a variety of control systems and gadgets 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 age 5 years and up; requires three AAA batteries (not included) Logiblocs kits to create almost endless combinations of custom systems and gadgets