Abstract: Playground devices in the form of building constructions are provided to relax, entertain, exercise and teach children while always maintaining them in full view and within easy access from the outside to their parents or attendants. The structures are divided into rooms or cubicles interconnected to form a variety of maze passages on a plurality of levels permitting the children to selectively and sequentially advance from an entrance to an exit or return to the entrance. The devices may include dining rooms, play rooms, exercise zones and the like, interconnected in such a way that the child has many ways to use the devices.

Abstract: A composite mailable business record and envelope assembly requiring only single manual entries to produce an original enclosed in an envelope and a retained record copy has only a single sheet foldable into three page sections to produce an addressed envelope with entries retained on the record page. The record page has a tab end for retaining in a book or the like.