The original micro-sized building block. For the construction set fan seeking a superior building experience, Nano blocks offer a greater challenge, sophistication and detail than any other system. Create exquisite 3D works of art with incredible realism and authenticity. With amazingly small bricks mere millimeters in size and manufactured to the highest tolerances for a secure fit, you can build display worthy sculptures that can fit in the palm of your hand. Execute the finest details building precise models with astounding results. Helps develop logical thinking, problem solving and fine motor skills. Each project includes step by step instructions.