Combination play yard, sandbox, and wading pool

Claim 1

AN ARTICLE OF MANUFACTURE FOR THE USE OF INFANTS, COMPRISING A SUBSTANTIALLY CONTINUOUS FOLDABLE SIDE WALL FORMING AN ENCLOSURE HAVING A GENERTALLY OPEN TOP AND BOTTOM, A BOX-LIKE MEMBER INCLUDING A FLOOR AND UPSTANDING WALLS WITH AN OPEN TOP, AND MEANS FOR DETACHABLY SECURING THE FOLDABLE SIDE WALL ADJACENT ITS BOTTOM TO THE WALLS OF THE BOX-LIKE MEMBER AT THE TOPS THEREOF SO THAT SAID SIDE WALL FORMS AN EXTENSION THEREOF WHEN THE SIDE WALL IS EXTENDED, MEAN TO HOLD THE SIDE WALL EXTENDED, SAID ENCLOSURE BEING DISPOSABLE IN EXTENDED CONDITION ON A SURFACE BY ITSELF WITHOUT THE BOX-LIKE MEMBER FOR USE AS A PLAY YARD WIHTOUT A BOTTOM, SAID FOLDING SIDE WALL INCLUDING A BOTTOM FRAME AND SAID BOX-LIKE MEMBER INCLUDING PERIPHERAL FLANGE MEANS EXTENDING OUTWARDLY FROM THE UPPER PORTION THEREOF, SAID BOTTOM FRAME AND SAID PERIPHERAL FLANGE MEANS BEING PROVIDED WITH COMPLEMENTARY CONVEX AND CONCAVE SURFACES TO FACILITATE READY MOUNTING AND DISMOUNTING OF THE SIDE WALL WITH REFERENCE TO SAID BOX-LIKE MEMBER.