It's sometimes hard to figure out which They Might Be Giants songs are aimed at grownups and which are meant for kids; the duo's love of wacky gestures and smart but silly songwriting means it's easy to confuse the two. "Circular Karate Chop" doesn't necessarily indicate its intended audience, since who doesn't love a killer pop hook and a goofy, spaced-out bridge? But the Brooklyn-based songwriters (inhabitants of that borough long before the last three or four waves of hipness) have set their sights back on the over-12 portion of their audience. "Call You Mom" is an awkward dating tactic. (Does any woman want to hear that she reminds her date of his mom?) "Tesla" is a history lesson of the legendary inventor in two minutes. The 43-second "Sleep" is the first of nine songs that come in at less than a minute. These miniatures prove a song can be anything you want it to be.