Feature: 1. Selected high-quality wooden materials, environmentally friendly, non-polluting, more assured use. 2. Self-made rubber band power robotic arm, small production toys, cultivate interest, develop intelligence. 3. Scientific experiments manual small inventions to assemble toys to cultivate the ability of manual brain. 4. Science and technology toys, science puzzles, can cause children's curiosity. 5. Cultivate your child's cognitive, observation, memory, understanding, and coordination of various parts of the body. Specification: Item Type: Toy Name: Rubber Band Arm Product Expansion Specifications: 20*9*17.5cm Material: Wooden DIY: Yes Packing: Opp Ziplock Bag Ability Development: Intellectual Development Science and Education Toy Type: Physical Class Applicable Age: Juvenile (7-14 years old) Benefits: Health and environmental protection, scientific puzzles, small production toys can cause children's curiosity and scientific and reasonable settings and other characteristics are favored by more and more parents, become the helper of parents to educate their children. Such as cultivating children's cognitive ability, observation ability, memory ability, understanding ability, coordination ability of various parts of the body, etc. Applicable People: No limit, boy, girl Ability Training: Manual brain, interest training, intellectual development, hearing, parent-child communication, interactive toys Package List: 4 x Board6 x Rubber Band2 x Friction Plate2 x Glue2 x Manual