A play enclosure for interchangeable use as an artwork center, paper cutting and coloring area, a sand and water play enclosure includes an open top, rectilinear, box-like structure having short side walls as compared with a length and a width of the rectilinear structure. A peripheral shelf slopes inwardly from peripheral top edges of all sides of the open top of the rectilinear structure. The top surface of the peripheral shelf is spaced from a bottom of the enclosure and has an inward extension wide enough to function as a child's seat and a child's table surface. The peripheral shelf, in a preferred embodiment, has two corner cut-outs, at diametrically opposite corner regions of the peripheral shelf, adjacent an intersection of two side walls of the rectilinear structure. Each cut-out has a mouth open to a center region of the rectilinear structure. The shelf defines about the periphery of each cut-out, a peripheral groove open to the top surface of the shelf. Two discrete, removable corner elements have depending lips that matingly seat within the peripheral groove such that the elemental top surface of each corner element is coplanar with the top surface of the peripheral shelf. One of the corner elements has a cup for holding instruments such as crayons, scissors and the like, and a receptacle for a supply of paper. Another corner element is a strainer for sand or water.

A sand jack having a box containing sand and a lid are joined to a screw jack and both temporarily support a structure. When it is desired to remove the screw jack, sand is released from the box to reduce loading on the screw jack and enable the screw jack to be removed or to allow the nut on the screw jack to be rotated.

An inflatable jumping toy typically employed in a play area by children performing jumping exercises is disclosed. The inflatable jumping toy comprises a construction incorporating a large torodial-shaped tube utilized as a base element and a vertical retainer wall mounted upon the top of the torodial-shaped tube. The retainer wall functions to absorb the lateral impact of a child against the jumping toy and to prevent a child from falling out of or being accidentally ejected from the jumping toy. A multi-layer bouncing mattress which is surrounded by and in communication with the torodial-shaped tube serves as a cushioned floor to absorb the vertical impact of the children during the jumping exercises. In a preferred embodiment, the multi-layer bouncing mattress includes an upper floor layer having an I-beam construction for providing maximum impact absorption of the vertical forces associated with jumping. Beneath the upper I-beam layer is a lower floor layer comprising a single X-beam spiral construction which enjoys strong welded seals about one continuous spiral air chamber which promotes the passage of inflation air therethrough. As an alternative, a parallel X-beam constructed layer can be used as the lower floor layer. Either lower floor layer provides a robust, wear-resistant surface for indoor or outdoor use.

This invention relates generally to portable drawing surfaces and more particularly to a base structure with interchangeable components. The invention permits the manufacture of a base structure that can be combined with an accessory unit and a working surface to create either a lighted drawing surface or a drawing surface with a utensil accessory tray. This results in substantial savings in manufacturing costs as tooling requirements are substantially lowered. The lighted drawing surface includes a working surface, a lighting accessory unit and a base structure to provide a backlit surface for tracing and drawing. The portable drawing surface replaces the lighting accessory unit with a utensil accessory unit and thereby provides a drawing surface with a tray for displaying and organizing utensils.