You should switch the stickers around and then tell him to solve it. Well they'd have to figure out a new logical pattern to solve it, which is a pain the arse. No, I don't think it's possible to solve it at all after you switch stickers around. If you switch some sides, then the edges would be wrong. You switch edges, the sides would be wrong. Don't mess with the stickers, too much work. Too bad my stickers are peeling...Rubik's Cubes are like $10 now, too much for some plastic if you ask me.