There were, most likely, several different radio circuits that could be assembled.  The one that has survived is a single-tube radio, a grid-leak detector using a 1T4 tube, battery powered, and capable of driving only a pair of headphones from a strong local AM station.  The circuit was assembled on a piece of perforated Masonite, with a printed overlay to guide the young experimenter.  The only controls were tuning and a switch for the tube's filament.  No volume control was necessary (I suspect you were lucky to hear anything at all).

Once assembled and working, the "chassis" could be installed in the corrugated cardboard "cabinet", which was probably the original package for the kit.  It is marked as "Kit No. 1", suggesting there were other such kits in the series.