Tyler's Counting

Tyler was asking where Tommy was this morning, and I told him school. I asked if he wanted to go to preschool today, and he said no. Right now he is going to preschool 2 times a week, and so I asked him if he wanted to go 3 times now. He said "No, Zero. It's funny because he counts 1-10 all the time, but I had no idea he knew the number zero. It will be interesting to see if this is the beginning of him not wanting to go to school!