Feature: 1. REDUCE THE USE OF CELL PHONES: Assembling rotating target toys can reduce the time children play with cell phones and other electronic products, reducing the harm of electronic products to children. 2. CONCENTRATION TRAINING: Scientific experiment circuit building block can cultivate the child's concentration, so that the child is not easy to desert when doing a task. 3. STIMULATE IMAGINATION: Mechanical rotating target toys cultivate the child's spatial imagination, so that he is not bound to a conventional idea when facing things. 4. HAND AND BRAIN COORDINATION: Rotating target toys cultivate the child's hand and brain coordination, so that the child can do things with ease and thus play to their strengths. 5. EXCELLENT MATERIAL: Hydraulic power mechanical toys are made of high quality plastic, with a hard and reliable texture and a long service life, and are safe for children to play with. Specification: Item Type: Assembling Rotating Target Toys Material: Plastic Age: More Than 8 Years Old Batteries: 2 x AA Batteries (Shipped Without Batteries). Package List: 2 x Blue Accessories1 x Gasket3 x White Accessories1 x Stickers1 x Battery Box1 x Switch1 x Motor1 x Iron Bar6 x Magnets1 x Large Spring5 x Small Spring6 x Fixed Nail1 x Chinese and English Instructions3 x Piece Block1 x Windmill1 x Base