Play equipment. This exclusion applies to a structure that is play equipment, as defined herein, provided that it is accessory to a residential use on the lot where it is located, and the lot is zoned for residential use, and the play equipment is set back at least three feet from any lot line. Play equipment is defined as a swingset, sandbox, jungle gym, or similar equipment that has no utility other than for amusement of children, as determined by the Village Building Inspector, but not including a structure that has walls and a roof which form an enclosure.