Topographical model of the state of Kansas, approximately 4 x 11 x 27 inches, made from fiber-reinforced cast plaster, coated with white primer; topological model of the state of Missouri, approximately 3 x 23 x 17 inches, made from fiber-reinforced cast plaster, coated with white primer. McCollum drove throughout the two states, and donated the models in person to 120 small historical society museums, to use as they wished.