What is a skeleton's favorite instrument?
A tromBONE

Surprise! Groovy Boar, I'm your Secret Santa! I'm so sorry that it's so late ^^' I chose to do Sans from Undetale, since I've started to love that game. I haven't played it myself, but I have watched Jacksepticeye play some of it, and it's great. And I just had to include some sort of skeleton pun, so I did the trombone one (since I play trombone myself). I hope you like it!