Not a Box is a children's picture book written and illustrated by Antoinette Portis.
It was published by Harper Collins Publishers in 2006.
It is graded for Newborn to 6 years old. It received a 2007 Theodor Seuss Geisel Award Honor and a 2008 Donna Norvell Award.
An animated series based on the book was released on Apple TV+ (now Apple TV) on June 13, 2025. The episode "Not a Boat" will compete at Annecy International Animation Film Festival in June 2026.
In 2008, Portis released a sequel to this book, Not a Stick.