I wish I knew who came up with this idea, but I don't. It's such a great way to use tin cans, that are practically useless after the juice is emptied from them. Better the cans are sitting pretty in a home, than sitting in some nuisance ground for years and years.
I wonder if other people have some interesting ideas to make footstools, especially from recycled materials.
(An hour after I posted this, Cindy left this link in the comments. Very interesting! Thanks a lot!)