Feature:1. Enjoyable DIY: Just enjoy the fun DIY time with your children, which will also better cultivate their interest in science.2. Hydraulic Arm: 8pcs attached syringe can stably drive the hydraulic mechanical arm for flexible movement, no battery needed.3. Easy Learning: The whole robot arm building block can clear show the robot structure and exercise hands on ability as well.4. Good Material: Adopting high quality beech wood without painting, the surfaces have no paint, very safe and durable to use.5. Ideal Present: Not only is the robotic arm a fun toy, but also an excellent present for your family, friends and loved ones.Specification:Item Type: Robot ArmMaterial: BeechFunction: Handmade puzzle teaching. Paint Material: Wood without paint. Wooden Building Block Type: Building Blocks.Package List:3 x Wooden Board7 x Bag of Accessory1 x Sand Stick8 x Syringe2 x Hose1 x Glue1 x Screwdriver