I think your website looks great! the top part from the google search button up looks very professional.. i think the design is not bad at all.. i give you 8/10 good luck!
404 errors everywere so i guess you've just started this site. Minor design problems(maybe firefox showsit that way) but very njice. good luck with it!
I had no problem with loading time or with Firefox 3. The site looks great. I agree about the seo problems with flash.. flash is not searchable at this time, but that will eventually change. I would use a footer to clean up the bottom part of the page. Have you thought about an interactive section where a parent could play a game with the kids? or maybe learn the abc's ... something like that?