You may view or print out the sheet music, which is linked with the title on the left, if you have Adobe Reader installed on your computer. This is available free from Adobe, here.
You may hear the music played by clicking on one of the links at the right, if your computer is set up to play MIDI files. By right-clicking on one of these links, you may see the option to open a new window or tab, thus leaving this window open for your next move.
Feel free to download, sing, print, and distribute this music, but remember the authors. Don't do anything that would impinge on their rights.