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| Published | 2007 |
| Publisher | Paradise Press |
Sun! is a 2007 Elmo's World board book in which Elmo learns about the Sun.
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 Stars!
A squeak-toy sun is built into the final page of the book. The reader is instructed to squeeze the toy whenever the text includes the word "sun".