Thames & Kosmos Air + Water Power
Pneumatic Hydraulic Engines.  Build your own models powered by air and water pressure to learn about the laws of physics.  This unique kit allows you to build two different air and water powered systems:  water jet propelled cars and hydro pneumo (which simply means air pressure and water pressure)  powered engines.  The hydro pneumo system uses a self contained air and water turbine system as a motor.  Construct 15 models including a truck, excavator, radar car, tank, antique car, helicopter, motorbike, backhoe, rocket car, forklift, roadster, propeller plane, grinder and cutting machine.  The water jet propelled cars are a fun outdoor activity, while the self contained hydro pneumo powered models are fun both indoors and out.  Compete with your friends to see whose water jet propelled car and hydro pneumo car goes the farthest.  48 page color instruction book.  165 building pieces