CAPTIVATING DESIGNS: Even young children will delight in figuring out how to put the pieces together and attach the gears creatively and independently. The 6 largest gears have stickers that make captivating designs as they spin. The square base pieces interlock easily to form flat or 3D structures. You can even make a gear box! | CRANK UP THE FUN: Create your base then insert axles and connect gears so that they rotate at the same time. Finally turn the crank to start a spectacular chain reaction and watch the beautiful visual effects. Kaleido Gears construction set provides hours of fun while introducing children to basic principles of mechanics. | LEARN AT PLAY: This simple yet highly educational toy is great to encourage your childÄôs creative skills hand-eye coordination and develop fine motor skills and hand dexterity. Start your childÄôs artistic development early with the Quercetti Kaleido Gears. | INTELLIGENT TOYS: Quercetti toys are designed for children ages 3 to 12 to encourage reasoning stimulate creativity and hone physical skills. Quercetti toys span a wide range of categories and stages from early skill builders to craft activities pure educational products to advanced construction sets. | PRODUCT SPECIFICATIONS: Package contains (1) Quercetti Kaleido Gears. Includes 6 large gears 6 stickers 1 crank 22 white axles 6 small gears 4 middle gears and 16 interlocking plates. Largest Gear is 4.5″ in diameter. Recommended for children aged 3-7.