Let your children explore endless building possibilities with this unique building system from K'NEX! The K'NEX Thrill Rides Electric Inferno Roller Coaster Building Set comes with 639 parts and pieces, including a motor and chain lift with a coaster car. All of the pieces can be clicked together to create a variety of 3D configurations. With the Electric Inferno Building Set, kids can create a motorized, moving roller coaster that stands up to 2.7 feet tallEasy-to-follow, step-by-step building instructions are included with the package of the K'NEX Thrill Rides Electric Inferno Roller Coaster Building Set. Unleash your kids' creativity as they make their own designs for open-ended fun! This building set is recommended for children ages 9 and up.Help your kids develop a better understanding of STEAM (science, technology, engineering, arts, and math) with this building toy. As they click the parts together and discover how the building system works, they strengthen their hand-eye coordination, fine motor and problem-solving skills, and spatial awareness. K'NEX rods and connectors are responsibly made in America at a landfill-free, zero-waste green manufacturing facility in Hatfield, Pennsylvania. The strictest quality and safety standards are used in testing this building system to ensure that your child has a successful, trouble-free building experience.For a toy that is not only fun but educational, choose the K'NEX Electric Inferno Roller Coaster Building Set!