Cory mentioned that he had another pair of pants with a belt just like it, but he never wears the belt, because he doesn't know how to fasten it. He had tried pulling it through the rings and tucking it into a belt loop, but it just didn't stay. So I explained - you put the end of the belt through both rings and then bring it back through one of them. He still didn't get it, so I had to demonstrate. Through both rings, back through the top one:
"Oh!" he said. "Now I can wear my belt."
Silly kid. Why didn't he just ask in the first place?