This educational construction set helps students learn the principles behind pneumatics and uses realistic models to demonstrate how compressors, pneumatic valves and cylinders work. The powerful and compact compressor guarantees a reliable supply of compressed air to the models. In addition to vehicles such as front loaders, hay bale pickers and tree trunk grips, other educational models provide students with hands-on knowledge on the subject of pneumatics in combination with the instructional teaching and activity guide, which is also included. Contains 360 components (including a compressor, four pneumatic cylinders, four 4/3-way manual valves, and a battery holder for 9V block batteries) for building eight different models. Requires 9V battery, not included.