A central housing is provided in a generally rectilinear configuration. The central housing has a horizontal open top, a horizontal open bottom and side walls. A horizontal divider panel is provided between the top and the bottom. A plurality of interchangeable upper components is chosen from the class of upper components. The class of upper components include a cover, a seat, a small planter and a large planter. The upper components are adapted to be selectively positioned on the open top and depend into the upper component. A plurality of lower components is chosen from the class of lower components. The class of lower components includes a base and casters. The base is adapted to receive and support the bottom of the housing. A lateral opening in the housing is provided adjacent to the bottom for storage of selected upper components.