we had a knotted rope swing from a leaning cottonwood and a telephone/rough lumber platform. it was the first project when my guy got the old sand pit (damn divorces). it was a blast. and there was a safety rail on the platform (wobbly) that one could stand on for more boost. the really good ones could jump off rail and get back off on platform. but of course the crashing/flipping/screamin from 15-20 feet on the lake side was calamatous.