From this page you should be able to see and hear the computer playing the scores.

For this page to work, you will need to install a plug-in called Sibelius Scorch. If you have already this, you should see the score of Agua de Beber appear below; if you don't, you'll get instructions on how to install it. It's worth persisting with, as it's a good learning tool. If you really can't persuade it to work, then alternatively you can get PDF files to print.

Clicking the download button will allow you to download the .sib file. You can then go to the Sibelius website and download (for free) a trial version of their program which will play these files. This allows you to play individual parts of the score, and it even works on Macs.