When I was a kid the playgrounds that I played on were sand blacktop, or a combination of them...When you were playing on the monkey bars and fell you learned not to fall again really quick.....when you fell off anything you either had the wind knocked out of you...or you recieved some kinda injury that taught you to be tougher......I took my son to school and looked at there playground and it was a rubber material under everything...I watched a little kid fall off the monkey bars, take a bounce, and get up and proceed to do the exact same thing again...now I am all for making kids safer...but I always thought that the blacktop and sand were an important and humiliating lesson...they toughened you....they gave you cool scars...good memories and lessons on how to administer first aid on your self...now we are teaching our kids to be wusses and that it is ok to do the same stupid stunt over and over because you will just bounce