The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Victor Ren:
NEW!! FREE DOWNLOAD!!=============== Kid's Play Piano===============Piano designed for kids! A musical tool that provides music & entertainment value for kids!! Easy to use with a simple tap! Kids can use their creativity to create songs and music. + Plays different musical notes!+ Quality Sounds!+ Colorful Design!+ Easy to use interface! GET IT NOW!* We are currently updating the app! Thank you for your patience!Note: Most of our users are able to play the piano sounds, if you are experiencing any sound problems, please let us know which version iTouch/iPhone you are using so we can solve the issue.