Simple Hydrolic Machines: https://www.youtube.com/watch?t=69&amp;v=VFje0G69ku8 Robotic Arm Kit Amazon: http://www.amazon.com/American-Science-Surplus-Pathfinders-Robotic/dp/B0087V3N3U/ref=sr_1_4?s=toys-and-games&amp;ie=UTF8&amp;qid=1443491652&amp;sr=1-4&amp;keywords=hydraulic 4 Machine Kit: http://www.amazon.com/Pathfinders-Hydraulic-Machines-Platform-Excavator/dp/B00192MFDS/ref=sr_1_1?s=toys-and-games&amp;ie=UTF8&amp;qid=1443491652&amp;sr=1-1&amp;keywords=hydraulic Syringes and tubing could also be purchased separately…