This picture of McKay explains it all. The kid doesn't have a serious bone in his body. He is always laughing, telling jokes, and goofing off. (I feel for his school teacher.) Once we had to meet with the Dean at school, McKay would crawl under the drinking fountain and unplug and plug it in so the water would bounce up and spray the people in the face. He didn't just do this to students but all who used the fountain. At the meeting, it was really hard to keep from laughing, so I asked the teacher if "she had ever considered that he was learning about electricity." That didn't go over so well.
In today's tough world, if you can get through your days with a smile on your face, than more power to you. I wish my life was as carefree as his.