Soar to the skies with the Smartivity Hydraulic Plane Launcher! Use hydraulic pressure to launch paper planes and missiles. Assemble your own hydraulic pressure-based plane launcher with the easy-to-understand instruction manual. Decorate with your paint and markers and fold your paper planes. Just fill the syringe with water and boom, your paper plane takes off! A fun set to learn all about hydraulics, scissor mechanisms and aerodynamics.