It's fun teaching, observing children and reminiscing what it was like to be that age.
Remember what it was like to want to run everywhere you went. Run to turn in a worksheet at school. Run when you see your parents to take you home. Run to the water fountain.
Funny. I'd probably look crazy if I did that now, but it's funny to watch my carefree students (they have a baffling amount of energy. Seriously. I get tired just watching them).