I first read this book with my 4 year old grandson. I just thought is was great. So, I bought this book to read to my high school math classes as the end of the year. My classes all loved it. Even high school kids enjoy story time. I had a couple of students create a poster for my classroom that was modeled after the book. (The poster starts with it's OK to make doofus mistakes, ask questions, have bad days, be less than perfect, do what's best for you, be yourself.) Thanks you the inspiration.