Whistling

J.R. for some reason decided that now was the time he was going to learn how to whistle. He practiced blowing for a couple days until finally sound came out. I started noticing him practicing on Saturday and sometime Sunday we had a whistler. When he was practicing blowing it wasn't bad, but now we hear whistling all . . . day . . . long. On Monday morning I told him that he couldn't whistle in class and he said "I know mom!". And at the end of the day, while he was whistling, I asked him if he whistled in class and he said no. I was really surprised.