Circuit Cubes are easy-to-use electronic building blocks that bring toys to life – and in the process, help kids grasp the fundamentals of circuitry. Circuit Cubes can stack in every direction, and are designed from the ground up to fully integrate with not only LEGO building blocks, but household items like old toys or recycled milk cartons. Circuit Cubes have a unique, transparent design that lets kids literally see the connections being made when they light an LED, power a motor, or activate a switch. This way, kids can intuitively grasp the basic fundamentals of electronics and STEM through play, without relying on screens or apps.