Flat Stanley is the first book in the classic children's series. The protagonist, Stanley Lambchop, is an ordinary boy until a large bulletin board falls on him in the middle of the night, leaving him permanently flat. Stanley's flatness, which is initially a shock, turns into a fun, useful advantage. He can now slide under doors, be flown like a kite, and, most importantly, be mailed in an envelope to visit friends in California, allowing him to have unique adventures no one else can. The book is a celebration of imagination, embracing differences, and the simple joy of travel and adventure.