Alex is back to school now

Last Thursday was Alex first day of school.He was not that kind'a excited coz he wanted to stay at home and play with his toys and computer games.I told him that he gonna meet his new teacher and new classmates but no reaction from him.I really don't know why he is not very enthusiast to go to school.But when we brought him to the school,he was happy and mingled right away to other students.I just hope that he will continue like that coz normally he wants to play alone and doesn't want to mingle with others.