I googled "bipolar kids" and there are a ton of sites. Here are the 6:

http://www.bpkids.org/site/PageServer (great/extensive)
http://www.connectwithkids.com/tipsh...4/bipolar.html (not sure, seems more like foster care?)
http://www.keepkidshealthy.com/welco..._disorder.html (basic info)
http://bipolar.about.com/cs/kids_diag/a/red_flags4.htm (not bad but simple)
http://www.geocities.com/enchantedforest/1068/ (good)
http://www.aacap.org/cs/root/facts_f...dren_and_teens (looks highly official/professional)
http://www.bpchildresearch.org/juv_bipolar/index.html (a research foundation)