50025 Create motorized, spinning amusement park rides with one of our featured building sets from the K'Nex Thrill Ride Collection. Combine all eight models for a realistic and exciting amusement park! Color coded instructions are easy for children to learn and play. Features: -Lighting Roller Coaster Building Set. -Thrill Rides collection. -Motorized chain lift. -Build over 3 feet high. -615 colorful K'Nex pieces. -2 coaster cars, motor and track. -Both cars accelerate through 19 feet of twists, turns and loops. -Requires 2 'AA' batteries. -Ages 9 and up.