Let children build their own roller coaster with K'NEX Clock Work Roller Coaster Building Set.K'NEX Clock Work Roller Coaster Building Set is a motorized roller coaster toy set that brings the exciting amusement park experience to your home. A clock hand is positioned at the face of the toy. This engineering set is fully functional - the hour hand lifts the car upward on the 2.6-feet-high track and lets it go once it reaches the top, where it rolls through the twists and turns with gravity-defying ease. This toy ensures hours of fun for children ages 7 and up. It makes for a gripping living room attraction and turns a child's room into a lively theme park.The K'NEX toy set contains 305 K'NEX parts, including rods, connectors, a roller coaster track, a red coaster car, and a motor. The pieces connect together to create a fun and engaging roller coaster ride. It requires 2 AA batteries to operate, which are not included. If you want to build a complete amusement park, collect the K'NEX Infinite Journey Roller Coaster Building Set and the K'NEX Revolution Ferris Wheel building set - both sold separately - and build them side by side, then watch the park roar to life.This educational toy promotes STEAM building (enhancing science, technology, engineering, arts, and math skills skills). This STEAM toy is not only an entertainment device but also a tool for developing hand-eye coordination, fine motor and problem-solving skills, and spatial awareness. Children will benefit from its complex yet easy-to-understand layout, challenging their minds and hands at an intermediate level of difficulty.K'NEX Thrill Rides allow children build bigger models that move, and to create amusement parks right in their own home! With the included parts, they can build a massive roller coaster, a majestic spinning Ferris wheel, and more - the heart-pounding fun is limited only by their imaginations.