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. This roller coaster model has 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. Details: Flyer roller coaster theme 28" length 539 pieces Compatible with the world's leading building block system For ages 10 and up