I've always hated grocery shopping - when I was a kid I was convinced it was a form of torture my parents used on me and even today, I'm much happier if I can breeze through while listening to my iPod. I think it might be the terrible music they play over the speakers. In any case, if they had the cartoon-playing cart attachments this Providence Journal article talks about when I was little, shopping might have been a much more blissful experience - for me and my parents. For $1, parents can rent one of the carts (there are two competing manufacturers), which are built to attract the eyes of toddlers and, of course, convince parents to pay the money to satisfy their young one's desires. The big problem right now: the cost of the carts may keep grocery store chains, who traditionally do not have much of a margin for error in costs, from adopting the carts.