3rd day of school

Benji is tired out after a week (3 days) of preschool. Today was a difficult day with sharing. He didn't want to and it seems he got agressive and pushed another child. So he didn't get a treat today.
His teacher also told me that they are trying to get him to not suck his thumb at school. I understand the germ thing.... it's just the thumb sucking is how he deals and now I wonder if the reason he got aggitated with the other child was because the teachers were on him about the thumb sucking. hmmm....
Just thoughts. the good thing is we ran to the store after school and on the way home he fell asleep. So I get to enjoy his nap time..... and hopefully he will get to bed at a better time.