Stars! is an Elmo's World board book in which Elmo learns about stars. The book is part of a set of four Elmo's World books about space; each book features photos of Elmo set against photos of outer space provided by NASA. The other books in the set are Moon!, Spaceship! and Sun! A squeak-toy star is built into the final page of the book. The reader is instructed to squeeze the toy whenever the text includes the word "star".