1. EDUCATIONAL TOYS : Gears Building Blocks is a great learning tool that encourages learning of mechanics and engineering, it is also an innovative toy set with 6 different colors to help children focus their learning on colors, matching, sorting, and identifying. 2. BATTERY POWERED : Unlike other building block gear sets, MUREN Gears comes with a built in motor. A flick of a switch is all it takes to spin all the gears automatically without the need of manually cranking it. Only one AA battery is required. (batteries not included) 3. PERFECT GIFT FOR KIDS : Actually it is wonderful for all ages with varying interests. Great for younger kids because they are easier to assemble with little hands. Round edges will not hurt. It's an educational toddler toy that makes a great holiday, birthday, or any day gift for both boys and girls. 4. SPECIAL FEATURE: Contains 81 blocks, which can move with battery power. There is no limit to creativity; you can make robots, moving cars, tanks, or any other object. The moving feature gives this an added advantage over regular blocks.