I am looking for a name of a book. It's a three book series about some friends who buy I believe is a game or doll house?? From a shady store and somehow end up in a different dimension where they have to defeat their fear in one room before they can move on to the next. I believe that one girl gets stuck in her fear of a messy room and they have to leave her behind, and in the second book they have to go back because one of their dad's is stuck in the other dimension in a carnival type of place, can anyone tell me the name of this book?