Unofficial LEGO MP3 Player
The "Homade LEGO MP3 player" is neither home-made nor officially a LEGO product, but its clever design—each nub is a button—is almost enough to convince me to make a purchase, despite a price of $46 with no built-in memory (it takes microSD) and a size considerably larger than a real LEGO element. (I can't quite figure out exactly how large the player might be, although I doubt it's 24 centimeters long as is stated on the product page. It uses a single AA battery for power, though, so that should give some rough idea.)
Catalog page [Homeloo.com via Technobob]

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Judging by the size of the headphone, it seems to be too big to fit with Lego.
Yeah, too big to be Lego... but is it Duplo?
Shoot, Sabik beat me to it.
noobs you are on the site of homeloo (www.homeloo.com) they say that it is 6 * 3cm big