CDX Blocks was established by a creative and enthusiastic team of designers, including a real roller coaster engineer. CDX Blocks Roller Coaster models are building block construction kits that let you build a roller coaster that really works, and that you can run over and over again. Just like the real thing, once the car reaches the top of the initial hill, it is designed to traverse the whole track back to the starting point, using gravity and potential energy in the most fun way possible. All of our roller coaster models are very mechanical in operation, with a gear shaft and crank to create that thrilling sense of the initial hill climb, and a unique smoothly operating track system for the downhill and thrills to follow. The Sidewinder blazes new trails. This amazing ride takes you up and over on a modern looping roller coaster. Modeled after contemporary steel style coasters, the Sidewinder twists and turns its through its compact and fun layout that includes a full vertical loop. At CDX Blocks, the emphasis is on PLAY. Our Roller Coaster models possess a high degree of playability and interaction after the build that our customers love. Visit our Store Page to learn more.