Operate an amusement park right in your home as you build thrilling rides with K'NEX 3-in-1 Classic Amusement Park Building Set! Set consists of 744 classic K'NEX pieces that allow you and your children to create 3 different models, one at a time. Set includes a battery-powered motor that gives life to the K'NEX pieces. Requires 2 "AA" batteries, not included. Set comes with an easy-to-follow instruction manual. Ideal for kids 9 and up. STEAMagination - It's the connection of STEAM (science, technology, engineering, arts, & math) with a child's curiosity and creativity. K'NEX supports the developmental growth of hand-eye coordination, fine motor skills, problem-solving skills, & spatial awareness.