KNEX Thrill Rides – Bionic Blast Roller Coaster Building SetBuild this incredible, thrill roller coaster using the included step by step, color coded building instructions. A first for a K'NEX Thrill Rides, the Bionic Blast Roller Coaster Building Set uses 2 Ferris Wheels to lift the roller coaster car to the top of the track! Once at the top, the coaster car rushes down the track and resets for another ride. Bionic Blast Roller Coaster Building Set Build it! using the 808 K'NEX parts and pieces, plus MOTOR,