Now that Colin Furze built himself a new lawnmower, he wanted a swing set he didn’t have to move every time he cut the grass. So he set about building a highly over-engineered, modular swing that’s held in place with steel beams set under the top soil. It’s a versatile structure, but not as imprssive as his 360º mega swing.
You could have a steam train, if you’d just lay down your tracks. Russian railroad enthusiast Pavel Chilin took Peter Gabriel’s advice literally, and built himself a working steam train engine that runs along a set of narrow-gauge tracks in his backyard. Additional footage here.