thumbsUp! self-assembly kit Hydraulic Robotic Arm Build your own hydraulic robot arm! Fun and easy to design, for children and adults the 3-dimensional model is a great demonstration of a hydraulic system. The arm function uses some of the same principles, the real machines can rotate small objects horizontally and 90 degrees. Specifications Colour: Caucasian Gender: junior Material: plywood Age: from 8 years Contents 1x Robot arm 1x Platform 1x Control unit