Arthur Lost in the Museum is a Step-Into-Reading book written by Marc Brown first published July 12, 2005.
During a class visit to the museum, Arthur needs to make a quick visit to the boys’ lavatory. But a wrong turn leads him into a diorama of life-size models of Pilgrims celebrating the first Thanksgiving . . . just as Mr. Ratburn and his class are about to study it. Will Arthur be in big trouble?