"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." A strong argument could be made that lithops are the world's cutest houseplant. Also called living stones ...

Invariably, when someone sees it for the first time, they ask: "What is it?" Then they poke at it, which is like poking your finger into a large hunk of gelatin. "Kids can't keep their hands off of ...