This Kaleido Gears construction set includes 38 multi-coloured pieces that can be connected and rearranged to create a wide range of spinning gears and moving parts for spectacular chain reaction, everything starts moving as soon as the crank is turned. There are 13 x interlocking plates 4 x large gears, 4 x medium gears, 4 x small gears, 4 x stickers for large and 2 for medium gears, a white pins and a crank included. Made from recycled plastics, the colourful gears come allows children to experiment with various combinations and designs. As children connect the gears together, they will learn about cause-and-effect relationships, as well as the concepts of rotation and movement. The Kaleido Gears also help stimulate their creativity by encouraging them to build unique and intricate structures. It comes with an instruction booklet that provides ideas and suggestions for building different gear configurations or use their own imagination to create their own designs and discover the endless possibilities. Suits ages 3 years +.