The Monsters decide to build an addition on to their castle, but must let the carpenters know how big they wish the new room to be. The program explores some of the ways children can gain accuracy in measurement taking and in communicating their results. The Monsters progress from describing a room that is “sort of long” to pacing it out and figuring out the number of steps. The contractor, Annie Ant, has her own idea of the size of a step which leads to the development of a standard “Monster Step” for actual and repeatable measurement. Our field trip is to visit a carpenter who explains how human beings use standard measurements in construction.