is preferred such as anchoring device may be used to position and hold a present invention universal leveling device in place while a screw may be inserted into the washer into a wooden structure leg to help stabilize and maintain its position top 11 of universal leveling device 1 has two parallel flat grooves 17 and 19 that intersect at right angles with flat grooves 15 flat groove 15 has both ends open but could alternatively have one end or both ends closed these flat grooves are created to receive bottom ends of upright vertical legs or supports for such structures as elevated forts slides and swing sets alternatively they could be used to level or stabilize small unanchored structures such as sheds and gazebos also shown in fig1 is a portion of vee groove 23 on bottom 13 which will be discussed in conjunction with fig3 4 and 5 below fig2 shows the present invention leveling device 1 of fig1 with a right angled play fort leg contained therein the leg includes a first upright 12 connected to a second upright 14 these uprights conveniently fit into flat grooves 15 and 19 as shown the universal leveling device 1 performs a number of functions first it creates a level surface for an outdoor structure second it may be used to elevate one or more corners of a structure to bring the entire structure into a vertical or horizontal position from a tilt third it creates a moisture barrier between the ground and the outdoor structure forth it protects the outdoor structure from weed whacker and lawnmower damage fifth when stacked the devices will eliminate a free moving corner on the downside of a hill or recess in the ground sixth in some cases they.