Lilly loves school, and she especially loves her teacher, Mr. Slinger. When Lilly gets a purple plastic purse and brings it to school, she wants to show it to everyone. Mr. Slinger, however, makes her wait to show the purse, and Lilly gets mad. What she does to Mr. Slinger – and how she makes up for her actions later – show Lilly at her funniest and most creative.