Meet the ModularRobotics MOSS Exofabulatronixx 5200 Robot Kit: a STEM product that lets your kids invent their own custom robots. As they put it together, they learn about circuits and robotics. The kit comes with 52 MOSS blocks and 140 carbon steel spheres. It doesn’t require any programming as how its blocks are put together determines how each robot is programmed.
Proper instructions are provided to show you how to build robots. The kit has proximity, brightness, and other sensors. More info is available here.