A collapsible supporting structure comprising: a supporting structure comprising a top surface, a bottom surface opposite the top surface, a first end, and a second end opposite the first end; a first pair of collapsible legs comprising a first leg having a top end portion and a second leg having a top end portion, each of the top end portions of the first and second legs (25,27) secured to the bottom surface of the supporting structure adjacent the first end; and a second pair of collapsible legs comprising a third leg having a top end portion, a fourth leg having a top end portion, a second support bar for connecting the third leg to the fourth leg adjacent their top end portions, and a third support bar spaced apart from the second support bar for connecting the third leg to the fourth leg, the first and second pair of collapsible legs (26,34) operable to move between a use position wherein the legs (25,27,33,35) extend from the bottom surface to support the supporting structure to a storage position wherein at least the top end portions of each of the legs (25,27,33,35) are disposed adjacent to the bottom surface of the supporting structure; and one or more brackets disposed adjacent the bottom surface of the supporting structure, the one or more brackets positioned and configured to removably secure the second support bar to the bottom surface of the supporting structure in the use position and removably secure the third support bar to the bottom surface of the supporting structure in the storage position; wherein each of the legs (25,27,33,35) of the first and second pairs of collapsible legs (26,34) is of a length that is greater than a distance between the first and second ends (18,20) of the supporting structure; characterised in that the supporting structure is formed from blow-molded plastic; and the one or more brackets are integrally formed from the blow-molded plastic of the supporting structure. a supporting structure comprising a top surface, a bottom surface opposite the top surface, a first end, and a second end opposite the first end; a first pair of collapsible legs comprising a first leg having a top end portion and a second leg having a top end portion, each of the top end portions of the first and second legs (25,27) secured to the bottom surface of the supporting structure adjacent the first end; and a second pair of collapsible legs comprising a third leg having a top end portion, a fourth leg having a top end portion, a second support bar for connecting the third leg to the fourth leg adjacent their top end portions, and a third support bar spaced apart from the second support bar for connecting the third leg to the fourth leg, the first and second pair of collapsible legs (26,34) operable to move between a use position wherein the legs (25,27,33,35) extend from the bottom surface to support the supporting structure to a storage position wherein at least the top end portions of each of the legs (25,27,33,35) are disposed adjacent to the bottom surface of the supporting structure; and one or more brackets disposed adjacent the bottom surface of the supporting structure, the one or more brackets positioned and configured to removably secure the second support bar to the bottom surface of the supporting structure in the use position and removably secure the third support bar to the bottom surface of the supporting structure in the storage position; wherein each of the legs (25,27,33,35) of the first and second pairs of collapsible legs (26,34) is of a length that is greater than a distance between the first and second ends (18,20) of the supporting structure; characterised in that the supporting structure is formed from blow-molded plastic; and the one or more brackets are integrally formed from the blow-molded plastic of the supporting structure.