The U.S. Postal Service has released a new pane of Forever stamps featuring a beloved children’s book.

The U.S. Postal Service unveiled stamps based on artwork from the classic children’s book “Goodnight Moon” at The Rabbit hOle, a North Kansas City-based museum that brings to life a century of American children’s literature, including the book’s iconic Great Green Room.

The museum’s immersive Great Green Room exhibit, modeled after the book’s bedroom setting, served as the backdrop for the launch, USPS said in an announcement.

“These nostalgic stamps not only celebrate the timeless charm of ‘Goodnight Moon’ but also highlight the enduring relevance of both stamps and children’s literature in a digital age,” said Lisa Bobb-Semple, the Postal Service’s stamp services director, in the announcement. “The enthusiastic response from the public about these stamps has been exciting — a reminder that the joy of stamps continues to inspire all generations.

Written by Margaret Wise Brown and illustrated by Clement Hurd, “Goodnight Moon” debuted in 1947 and has become one of the most beloved bedtime stories in the world, USPS said.