Build your own roller coaster with this beginner CDX Blocks set. The Little Dipper set includes 332 pieces, including the track, structure and car. Compatible with other block systems, like Lego. A chain that can be manually operated pulls the car to the top of the first hill, then gravity takes over to complete the track. High quality bricks and precision machined parts make a great introduction to model making. For adults and children ages 10+.