I do not regulate my 6 year old son on tv, video games, or computer time. If he spends 5 hours one day going between all three, it makes me no difference. I find all of it educational. There will be some days he doesn't do any of them. He loves to read, play outside, play board games, draw etc. He reads at a 6th grade level (he just started 1st grade), he does multiplication up to 5's, he makes up his own games for us to play (usually some sort of word game), he's learning French and Spanish (reading, writing, and speaking), he has lots of friends, and interacts with them just fine.
I have never seen him be able to access Youtube from Webkinz. I play on there sometimes and I've never done it either. He doesn't play on there much though. He has a few other sites he likes because they have racing games. He also like wikipedia.
I think it all depends on the kid when you choose how much time to allow for each.
at 6:27 PM on Sep. 7, 2009