ABSTRACT
In the previous chapter I described drawings by children based on a denotation system in which regions denote volumes. The shapes of the regions in these drawings reflect the extendedness of the volumes they denote, so that long regions are used to stand for long volumes and round regions are used to stand for round volumes. Flat volumes, such as disks or slabs, may be represented by either long or round regions, depending on the context. In addition, the shapes of these regions may be subject to shape modifiers such as “being pointed,” “being bent,” or “having flat sides.” The drawing systems in pictures of this kind are typically based on topological geometry and may or may not provide possible views.
