At what point do children become picky about their playmates? In the sandbox? On the school playground? Are there things we can do to prevent them from developing prejudice?

I'm working on a future column on at what age children start to exhibit prejudice against people who are different from them, and what can be done to teach them to be more accepting of diversity. If you have an experience or a story to share dealing with this issue, I'd love to hear it.

You can email me at lboyles@fresnobee.com. Thanks!