Set comes with 8550 classic K'NEX pieces to build your very own coaster. °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. It powers the fun of each K'NEX set. °K'NEX Thrill Rides allows each child to build bigger models that move to create an amusement park right in their home! Packaging may vary.