Children still in kindergarten or even younger form cliques and intentionally exclude others, say psychologists and educators who are increasingly noticing the behavior and taking steps to curb it.

This article makes me so sad, I'm just glad there are people working to combat it. I know my daughter will go through it all, like I did. Even so, I'm sure the first time she comes home crying because she got left out, I will go to bed that night and cry my eyes out for her.

http://on.wsj.com/1imc1Xi