Erector Special Edition Multi-Model Metal Construction Designer Set (Dual motor) by Nikko America Power 3V and 6V motors make your creations come to life 617 pieces of building blocks for constructing 50 diferent models Assembly Instructions & Tools, classic erector construction project with step-by-step Create exciting movements such as turning wheels, lifting crane, moving robot, rotating helicopter blades Carring/Storage Case that's Gift-Ready