Rex London Make Your Own HYDRAULIC POWERED ROBOT ARM. Create your own robot grabber arm with this amazing DIY kit! This kit contains everything needed to assemble a robot arm model that makes use of hydraulic power to open and close the hand. Not only fun to build but also a great way for children to learn the basic scientific principles of hydraulics. A great gift for creative kids who love to make experiments! Instruction booklet included. Product Materials: cardboard paper, plastic (PP), plastic (PVC), rubber, paper stickers, metal, foam, and adhesive. Requires scissors (not included). Measures approx. L 60 x W 11 x H 3.5 cm once fully assembled. Package Size: 16.5 x 5.5 x 21.5 cm. Recommended for children age 8 years and up. Caution! Not suitable for children under 3 years old. Choking hazard due to small parts. Please read all instructions and warnings carefully before assembling the arm. Some of the metal components might have sharp edges, so adult assistance is required when assembling and using the arm.