It's nice the way the ant-father doesn't even bother waiting for his ant-son's reply after asking how his day was yesterday. Instead, he just picks up the newspaper and begins reading, as he no doubt does every day whenever his ant-son is around. That's quality comics section parenting right there.
Given this, it appears that the ant-son has participated in some newsworthy act of delinquency with the intent of garnering some attention from his neglectful ant-father. It seems unlikely to work, however.
It should go without saying that all of this is hilarious.