Mason couldn't wait to celebrate his birthday with a sleepover at the museum of natural history--his favorite place to visit.

Armed with headlamps for the dark hallways, a map, and a list of clues, Mason and his two best friends take off on a scavenger hunt through each hall of the museum. But they aren't just trying to solve the clues. They're scouting for the best place to spend the night.

Sleeping next to a T. rex in the Hall of Dinosaurs felt too scary. And sleeping with the monarch butterflies would probably tickle. This decision isn't as easy as Mason thought it would be....

Wherever they end up, the museum at night is the best place for a birthday adventure!