ThinkGeek, home of a million distractions, are offering Super Mario plushies that make authentic sounds when you whack 'em. So the Coin Block makes that oh-so-familiar coin sound when you thump it from below. The Goomba makes a 'bop' and then plays the defeated sound while the Star plays the Mario Star Song.
If you've devoted a significant part of your brain to archiving those (and many other) game sounds, you probably don't need any more encouragement to get thee to the Geekerie and have already scuttled away, leaving nothing but a Super Mario-style dust cloud in your wake. Just remember that it is physically impossible to have too many plushies, no matter what anyone tells you. It's one of Newton's laws, wedged in there between gravity and, um, whatever else he did. True story.