Sewing, glue, iron-on-patches, welding, hooks, zippers are ways of holding things together. . . and then there are teams and clubs for holding people together and the word ""and"" for holding words together. It's hard to imagine what children really learn from this kind of once-over except a way of observing and generalizing, but if the Epsteins' Who Needs Holes (1970) and Pick It Up (1971) were found to work as classroom conversation starters, then perhaps Hold Everything will be similarly functional.