Some useful links

http://www.ohiou.edu/nursing/CourseDocuments/303_1.doc

This is a checklist for a playground. I accessed it 3/5/05, and it was still active. This will give you a good idea of the criteria one must consider while maintaining an existing playground to ensure safety, yet allow children to explore in the outdoor classroom.

http://www.cdc.gov/ncipc/factsheets/playgr.htm

This is a compliation of playground injuries statistics. I accessed this site on 3/5/05. This should give you a deep appreciation for policies and guidleines for playground construction.