Marbleworks is a chilren's toy released in 1982 by Discovery Toys that consists of colorful, sloped, plastic half-pipes of different designs. The individual pieces interlock, creating a track on which marbles are run. Marbleworks teaches kids lessons in gravity and construction and provides an exciting racetrack for endless marble entertainment. Marbleworks pieces are made of hard plastic and come in red, yellow, blue, and green colors. The track pieces are open and allow the marble to be followed as it makes its way down the track. Each track piece is the same length allowing for easy connections, and has round fittings on each end that easily fit into the next piece. There are several types of track that make watching and racing the marbles very entertaining, and allows for many creative tracks to be built. One Marbleworks set contains enough parts to form a small tower, but multiple sets can be combined to build larger and more complex tracks. With enough pieces, a marbleworks tower can reach eight or nine feet high. A Marbleworks racetrack begins with the start funnel and ends with the finish line, and the builder is free to create his or her own type of track in between with the diverse pieces. A Marbleworks set and a handful of marbles presents numerous types of play for all ages.