Four and a Quarter

Max's teachers send home maths homework every week and last night one of Max's exercises was to write down his age, so he wrote a four and then he started drawing something else next to it. We asked him what he was doing and he said "I'm four and a quarter, so I'm drawing a quarter." And sure enough it was a cute little coin with a person on it. He ended up doing another one next to it. The cuteness makes my head spin. Of course, soon he'll be four and a half. I wonder how he will represent that.