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. Modeled off of the simple old-fashioned wooden coaster, the Flyer is easy and fun to build. It features a classic hill climb followed by several downhills and curves before taking you back to the start to do it all over again. The Flyer is in the middle of the CDX Blocks line in ease of assembly for a great combination of fun and value. 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.