Fischertechnik Pneumatic Power Building Set

The new low-cost Pneumatic Power construction set takes a learning-by-playing approach to the principles of pneumatics, with realistic models to show how pneumatic valves and cylinders work.
The air is pumped manually into an air chamber.
Pressing the hand valves conveys the compressed air through the hoses into the pneumatic cylinder.
An excavator and four other models can be constructed.
The didactic activity information for pneumatics is available online for the young engineers.