www.KidsHealth.org
DuPont Hospital for Children in Wilmington, DE runs a very large website with excellent information about children's health and diseases. It is a great resource for parents and children. Teens can use this website for school research projects as well!
www.vaccine.chop.edu
This is the website for Children's Hospital of Philadelphia's Vaccine Education Center.
It provides comprehensive information about vaccine saftey and the diseases they prevent.
www.HealthyChildren.org
A great site from the American Academy of Pediatrics
www.cpsc.gov
A very complete toy safety website