Player Piano

I built a piano where you can push the button and it will play a song for you. It is really easy to add songs to it so it could actually play more than one song if I just added them to it. I wrote a blog post with plenty of pictures and explanations. I actually built a total of 4 pianos, but the last one is the one I'm really proud of. Check it out here: figment4444.blogspot.com

You can also come on the server at mc.gamingshmaming.net to see them all in person if you want. Use the warp gate in the house just outside of the spawn ship to get to the events world, then follow the signs. 

By the way, although there are plug-ins on the server, all of this is made up of things found in vanilla minecraft; no mods necessary.