Book 3 of 4. Smith devised the concept of "pureland", where the model should make use of valley and mountain folds only. No sinks, reverses etc were permitted. This suposed "limitation" encouraged the creator to find new and ingenious solutions to create new designs that were especially suitable for children. The models in this third book include a couple of birds a couple of aeroplanes a duck a bull and a santa with sack. Also incuded are instructions for creating a furnished room a decorated box with lid and a picture frame. 26 models simple.