Boy and the Balloon

http://www.cnn.com/2009/US/10/15/colorado.boy.balloon/index.html

Everyone is talking about an incident in Denver, Colorado. A weather balloon reportedly was carrying a little 6 year old boy. They found the balloon, but there was no boy inside. He is okay now, found in his parents attic. I noticed that little 6-year-old boys seem to have not developed the part of their brain that says, "Don't do that!" yet. There were two other stories that I had heard about a while ago. One about a six-year-old boy trying to hide in a microwave and suffocating inside it. The other about one climbing onto a closed ferris wheel and then falling to his death. My question is who was watching these kids? Should they be punished for this?