Abstract: A convertible infant activity center is configurable as a play mat, a seat-type device, and as a table-type device. Improper configuration of the device is prevented by an interlock which mechanically inhibits installation of the seat component when the device is not properly assembled in a seat-type device configuration. In its table configuration, the device can be arranged in a generally S-shaped form.

Abstract: A grinder pump system that is simpler to install, and permits ready access to the pump system components, has a grinder pump station for receiving a grinder pump. The pump station has a basin with an interior volume to provide a well for receiving sewage. A sewage inlet port and a sewage discharge port allow, sewage to flow into and out of the basin interior volume. The basin is positioned below grade, and sewage is directed thereto through a sewage source. An access riser is selectively coupled to the basin, and extends to the ground surface. Pump system components mounted within the basin are accessible via the access riser and an opening on the basin top surface. A lid assembly is selectively removably coupled to the access riser to close the system from the environment.