Everypony wants to feel like she's playing her part, contributing in some way, helping others. One of the great ways to "play your part" is by playing music, especially if that's something you can share with your friends.
Pony fan Teren has shared some guitar chords for You'll Play Your Part, so you can play your part by playing along. Check the chords out and give them a try!
Thanks for sharing, Teren!