Is it possible to make learning the concept of “ten” meaningful? These kindergarten children did it! At morning meetings for several days, the children read, sang, clapped, and dramatized the book There Were Ten in the Bed. Playing with 10 in this way was fascinating. Soon the children requested a favorite classsroom manipulative—an over-night story book bag—for this book. This article describes how the children interacted with, and documented their experiences with, the There Were Ten in the Bed story-book bag in the home setting. In particular, how children explored and expressed their concepts of tenness is delineated.