Car, boat and airplane in one
Hydro foam (rc boat, rc plane and rc car in one machine) are unique newradio controlled gadgets. They combine three machines in one: it is apowerful radio controlled speedboat, it can be used on land (grass,concrete, streets) as well as it's main function: it is also a rcplane. So combining a rc speedboat, rc plane and rc car in one machine.
Source: flyingpowerboat.comAdded: 8 June 2006