Life magazine looked back through its archives for weird inventions, including this baby soother. It's shaped like a human breast and vibrates to the rhythm of the human heart on the assumption that the form and cadence are familiar and comfortable to babies. Jokes aside, this actually sounds like a plausible hypothesis -- or at least enough to generate sales. I've got two young children, and I tell you, some parents will buy anything.
Link -via Gizmodo