Each bag: 1) has a picture of the child's face; 2) weighs the same as the actual baby. Yes, they're fake babies, but they're not all that realistic-looking, and that makes them somehow less creepy.
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.