My calling this 'mindless fun' isn't really a criticism--it's just pointing out that this particular short doesn't have an especially deep story but it is quite silly and enjoyable.
The first day of school has come and most of the kids seem excited to go to school--most except for Breezy. He sees no need for school and his father accidentally gives the boy the idea that he could get expelled if he's really bad--and Breezy plans to be just awful. But instead of being bad in an obvious way, he does a lot of things to drive the teacher crazy and get the other kids in trouble. And, when he thinks he's gotten what he wants, he isn't so sure if he really wanted that after all.
Cute and inconsequential--this one has more laughs and less story than usual. However, the very end made me wonder if perhaps Pete the Pup needed an ophthalmologist!