When the class visits the Hugh Mann Costume Company, they get an informative lesson about the importance of the human skeleton and the various purposes different bones of the body serve. Original.

Ms. Frizzle takes her students to Hugh Mann's Costume Company to find out why their skeleton costumes are all missing different bones, and in the process the class learns all about the skeletal system and how it works.

Ms. Frizzle's students find out why their skeleton costumes are all missing different bones, and learn about the skeletal system