Solfege keyboard

I found this:

http://www.people.vcu.edu/~bhammel/theory/resources/flash/fixed%20do%20keyboard.swf

From my readings about teachers teaching younger kids music Solfege seems like the consensus of how to teach but perfect pitch is taught in conjunction.

Here is a discussion of the progression of teaching kids music :

http://www.menc.org/forums/viewtopic.php?id=2832

Here is another page with music teaching ideas :
http://munchkinsandmusic.blogspot.com/search/label/Music%20Lessons

Here is a good site on teaching intervals:
http://lalemantpolyphonic.org/INTERVAL/main_menu.htm

How are you using the Solfege keyboard?