Interesting link! We've been on the other side of the issue more since DD always gravitates towards older girls at the playground. Normally they want her to play a complex game and sometimes she gets it, sometimes not. I always just stand back and watch because I figure if she didn't want to try and hang around that girl she'd just walk away. The only time I've ever interceded was when one girl pushed DD over because she didn't understand what the girl said...