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"Build the K'NEX Speed Demon Coaster, a new roller coaster building set that stands over 3 feet tall with over 19 feet of twisting, turning track! The set contains over 625 colorful K'NEX pieces, including a coaster car, motor, chain lift and track. Follow the color-coded instructions to build this exciting thrill ride step-by-step. Then switch the motor on to bring the model to life. The motorized chain lift carries the car to the top. As it crests the peak, the car accelerates through 19 feet of twists, turns, curves and loops. Instructions for a second dynamic model are available on www.knex.com. Speed Demon Coaster is appropriate for builders and roller coaster enthusiasts ages 9 & up. Requires 2 ""AA"" batteries."