I think that he loves being at school so much (with so many activities and things to do) that he doesn't like being at home anymore! I know it sounds ridiculous, but he has been so unhappy this afternoon. But, he never cries when I drop him off, his teachers say that he plays and smiles all day, and he doesn't cry or seem sad when I arrive to pick him up.
Is our little sunshine bored with mom and dad already????