I understand STAR GameSchool is teaching whatever games you donate teach; they seem to work off the software you give instead of creating their own or restricting themselves to the Oregon Trail (or the modern equivalents of it).
Vinny's Kids definitely lacks information, yes. I may contact them for more info, but right now it doesn't look like it does anything the others don't already.
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http://img812.imageshack.us/img812/3492/eponaharr.jpg
Nominate SuperNiceDog's Guru-choice, then Epona.