About 15 years ago I built a hovercraft for the kids, I used a gas leaf blower and cut a circle out of some 1/2 cdx and used a tractor tire inner tube for the seal, surprised the $hit out of me it hovered pretty good, just had a problem with the steering on it, but they could get out on the grass and I could shove them they had a riot, but I never did come up with a navigational system that I wanted to spent the money on to make it work
They wanted me to shove them over to the pond so bad, but I didn't want to lose the leaf blower if and when it sunk