http://www.playgroundsafety.org/

http://www.cpsc.gov/cpscpub/pubs/327.html

http://www.webmd.com/solutions/sc/healthy-home/swing-sets

http://en.wikipedia.org/wiki/Parenting

http://www.about.com/parenting/

http://www.pbs.org/parents/

http://www.noccawood.ca/

http://en.wikipedia.org/wiki/Trampoline

http://voiceofplay.org/index1.asp