Children don't come with manuals. Some of these links come pretty close, though.

Family & Parenting Resources
http://www.uen.org/utahlink/train/manuals/urlindex/family.html

Family Village (disability resources)
http://www.familyvillage.wisc.edu/index.htmlx

Connect for Kids (get their newsletter!)
http://www.connectforkids.org/

National PTA (links section)
http://www.pta.org/links/OrgLinks.htm

Parenting Today's Teen
http://www.parentingteens.com/

Family Education
http://familyeducation.com/home/

Parents Guide to the Information Superhighway
http://www.childrenspartnership.org/bbar/pbpg.html