Johnny Boo goes to school

"Johnny Boo doesn't know what school is, but if Squiggle is going, he wants to go too! School is where you have to wear an apple on your head so the teacher doesn't mistake you for ice cream and eat you accidentally, right? Well, maybe if your teacher is the Ice Cream Monster. There's so much to learn! After exploring the mystery of 'two plus two,' Johnny Boo and Squiggle try to figure out why the Mean Little Boy got bigger . . . and wait, how did he grow a mustache?"--Provided by publisher.