Abstract: A system, adapted for use with connectable building components used to build a unit, includes a structure having an open area accessible from the front of the structure for storing the unit. A baseplate is moveable between a storage position for controlled movement of the baseplate in the open area and an extended position adapted for building the unit from the connectable building components. The baseplate includes either a plurality of upwardly extending members, openings or other connectors for connecting the unit to the baseplate. Guide rails block upward movement of the baseplate and the closure when moved in the closed position blocks movement of the baseplate out of the structure. The system further includes a plurality of drawers having compartments positioned in the structure movable between a retracted position adapted for storing and transporting the connectable building components and an extended position for access to the connectable building component.