1. Hide them in a co-worker's sandwich. When they take a bite, yell "IT BIT YOU BACK!"
2. Wear them on a necklace and tell everyone they belong to people I've killed (seems a little cliche though.)
3. Mail them to an ex-boyfriend I haven't spoken to in years with no explanation or return address.
4. Carve an entire set of baby teeth from them, and donate to a baby in need.
5. Stocking stuffers!