Modular Robotics MOSS Zombonitron 1600 Kit Kit contains 16 MOSS blocks, 56 Carbon Steel Spheres, and a Micro-USB Charging Cable. This remarkably intuitive and elegant construction system lets you quickly play and experiment with robots. Use the steel spheres to create simple motion primitives. Combining joints, hinges and rigid construction yields wonderful kinematic creations. The MOSS Zombonitron 1600 includes 16 robot blocks that combine to create hundreds and hundreds of robots. Additional modules available separately.