Individual cubelets cubelets 855165004062 cubelets are a groundbreaking robot construction system designed for budding innovators aged four and up cubelets uses tiny robots to teach the big lessons behind complex systems design thinking and emergence detects the amount of light hitting its sensor the brightness cubelet has an analog photocell that responds to varying light conditions expect values near zero in a dark room and values near one when the sensor is in front of a bright lig