I was just remembering this book...I read it in the 80's, so either written then or in the 70's. I think that a teenage girl was running away, perhaps with a friend or with her brother. They go to a store to hide out for the night, and the mannequins come alive. the mannequins are actually really mean, and get mad when the kids take the clothes....and a whole bunch of other stuff happens that I can't remember
Trying to escape the vicious King Kobra gang and a troubled life at home, eighth graders Barnie and Teresa flee the city. With only four dollars between them, they hop a bus, hoping to find a new life at the end of the line. Destination: Paradise Park. But Paradise Park turns out to be a cement-covered suburban shopping mall--not quite the paradise they had hoped for.With  Trying to escape the vicious King Kobra gang and a troubled life at home, eighth graders Barnie and Teresa flee the city. With only four dollars between them, they hop a bus, hoping to find a new life at the end of the line. Destination: Paradise Park. But Paradise Park turns out to be a cement-covered suburban shopping mall--not quite the paradise they had hoped for.With no money and no home to retum to, they are forced to stay. And paradise park takes them in--in more ways than one. Barnie and Teresa spend their days and nights in the climate-controlled consumer paradise of a large department store. And just when they think they can live there unnoticed forever, Teresa and Barnie find that even Paradise Park has its secrets. Even in the dead of night, they are far from alone....From the Paperback edition. ...more