Suitable for kids 3+, the Marble Run 37-Piece Set includes 22 plastic pieces of various shapes and 15 marbles. Plastic pieces include ramps, tubes, funnels, and flippers for fun and complex creative builds. Two of the funnels are start funnels where marbles can begin their course. Every piece of the Marble Run set is brilliantly colored in one solid color and may be orange, red, blue, green, yellow, or purple. All pieces are made of high-quality, nontoxic plastic and designed to withstand numerous constructions and marble runs.