Features 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 Arm Material: Beech Function: Handmade puzzle teaching. Paint Material: Wood without paint. Wooden Building Block Type: Building Blocks Package List 3 x Wooden Board 7 x Bag of Accessory 1 x Sand Stick 8 x Syringe 2 x Hose 1 x Glue 1 x Screwdriver