Bill Fry Construction - Wm. H. Fry Const. Co. You should be able to get equal bounce from a trampoline installed at ground level or above ground level.
Round trampolines are safer than rectangular ones as they have less bounce and the energy of the jumper is directed inward.
In-ground Trampoline!!! Amazing idea!!!
With the trampoline the same level as the ground... Does it make it less fun for a kid??? Cuz they're not jumping as high as if it were on it's stand???
Do some research.... Try to find other people if they have a built in trampoline... And does it take away from the fun of bouncing with it so low to the ground.
Ask people what they think about it.