Abstract: A portable and compact children's training sink is provided with a main housing having a basin, a drain hole disposed in the basin, and a back splash panel substantially adjacent to, behind, and projecting above the basin. Support legs support the main housing, including at least one front support leg and at least one rear support leg. The front and rear support legs are spaced apart to accommodate and placed over or outside of a household bathtub or shower stall. A reservoir is preferably removably disposed in the back splash panel, and a spigot is in fluid communication with the reservoir and extends over and empties into the basin. When the rear support leg is placed inside a bathtub or shower and the front support leg is placed outside the shower, fluid entering the basin by gravity from the reservoir and through the openable spigot exits via the drain hole and empties into the bathtub or shower or a waste water receptacle.