Clearly what we have here is a handmade flute made of pottery clay. I know it's a Narwhal, or possibly a Blue Whale. Or maybe, just maybe, a musical turd. Any way you look at it, though, it's awesome, and I'm very fortunate to have such as kick-ass secret santa. Thanks so much, redditor from Pittsburg! You rule!

Edit: Could it be a sweet potato?