Mostly through pencil sketches (there are some pen and ink drawings), Zaidenberg again presents this age group with step-by-step instruction. His emphasis is on the capture of the geometric forms in nature and his illustrations are carefully built up-- from the first quick depiction of a scene to its elaboration. The elaboration never becomes too heavy, for Mr. Z.'s main point (and the hardest lesson to learn) is that the pencil and pen are for suggestion, not camera-reality. The book deals in sound advice for those patient enough to practice it.