Grown up kid school

Benjamin came in this morning wearing a collared shirt, sweater, and nice pants. He was working on putting a backpack on his back. "Know why I'm wearing fancy clothes today?" he asked. "Because I'm not going to the school I usually go to. Today I am going to a grown up kid school. Grown up kid school is for kids who are pretending to be grown ups. I'm wearing fancy clothes because today I'm a grown up kid. I have to go to school and give a presentation." (Scott wears his "fancy" clothes when he has to do a presentation at school and Benjamin is always very interested in what he's doing.) "What is today?" he continued. "Monday, right? On Mondays it's grown up kid school day. I'll go to the school I usually go to tomorrow."