HealthyChildren.org is a great and reliable site created by the American Academy of Pediatrics. Below are links to pages we find particularly helpful to parents.
Development/ Ages and Stages http://www.
Immunizations: http://www.
Nutrition: http://www.
Fitness: http://www.
Sports and Safety: http://www.
Oral Health: http://www.
Emotional Wellness: http://www.healthychildren.
Healthy active living: http://www.
Safety and Prevention: http://www.