I've thought about picking up a cheap bmx bike to play with. I can't do wheelies or any of those cool tricks, and I thought they might be easier to do on a smaller, lighter bmx bike. However, I don't feel like putting any money into such an adventure, when I have three bikes to maintain. But if there was one I could borrow, well, I might do that someday. I'm not a grandma, but my kids are grown, and I still think doing some urban bmx-ing would be a blast.