This question has come up a few times, actually I know we've done educational packages before, so I'll bring it up at the next meeting!
A heads-up, though: the May 29th build will be a pretty early version of the game. Would that be a problem, or would it be useful for kids to experience the development process in real time? Seems like it could be fun for them (finding bugs and seeing their feedback shape the final game), but I could also see it being frustrating. I'd be curious to hear your thoughts. Perhaps it would just depend on the group of kids.