You've got three?
- The first: I would keep just for nostalgia, and maybe teach your grandchildren how to "barrel" down a hill, come away with multiple bruises and minor cuts, and be rearing for another round. Builds character.
- The Second: Don't know your personal situation, but I would use it to burn certain types of non treated wood (spring pruning, free palettes from industrial estates etc... ) and get some ash mixed in with your soil. But again, it depends.
- The Third: Drill some decent holes in the bottom, find something awesome and unique to grow in it, and stick it front and center in a place where your neighbors are gonna start taking about it to one another, behind your back, and in a negative way... You know, the kind of neighbors that already have those balls of fake green hanging each side of the door (not sure about our friends around the world, but these soulless entities are a huge thing in the UK).
Oh, oldschool metal bins: So many uses.