Specifications: Name: Electric Gear Building Blocks Number of Blocks: 83/166/213pcs Material: ABS Plastic + Electronic Components Battery: 1 x AA battery (not included) Features: This fun shaped jigsaw puzzle type interlocking building blocks, motorized spinning gears construction set will help your children use their brain and develop important problem-solving skills, logic, and motor skills! Develops Creativity & Confidence: Enhance child hand-eye coordination and design skills by building different shaped gears and blocks! Inspire early child development while using imagination and critical thinking to create hours of fun! Strengthen thinking and cognitive skills through easy assembly with a free conversion of 2D and 3D models! Help ensure proper child development with this fun toy! 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. Suitable for children over 3 years old, as a birthday, New Year, Christmas, and holiday gifts to family and friends. Package Included: 1set x Electric Gear Building Blocks