Adventures in Hi-Fi: Mutant Ears!
Hear the world like you've never heard it before with Totally Amazing Mutant Ears!
OK, I'm not really sure what they are exactly, but they're kinda cool. Found these Mutant Ears on the Toy Design Workshop site, where they claim the things amplify sound to create "an audiotastic experience." The Mutant Ears were presented at the Mattel Student Design Summit 2006. There's also a wacky Mutant Ears "commercial" on YouTube for your viewing pleasure.