Collapsible structures

1. A collapsible structure, comprising:

a first end panel and a second end panel that is parallel to the first end panel, each end panel having a foldable frame member having a folded and an unfolded orientation, with a fabric covering the frame member to form the respective end panel when the frame member is in the unfolded orientation, each end panel further defining a periphery;

a first side wall having at least one panel, a first side and a second side;

a second side wall having at least one panel, a first side and a second side;

each panel of the side walls having a foldable frame member having a folded and an unfolded orientation;

wherein the first side of the first side wall is stitched to the fabric of the first end panel at a location away from the periphery of the first end panel;

the second side of the first side wall is stitched to the fabric of the second end panel at a location away from the periphery of the second end panel;

the first side of the second side wall is stitched to the fabric of the first end panel at a location away from the periphery of the first end panel; and

the second side of the second side wall is stitched to the fabric of the second end panel at a location away from the periphery of the second end panel.

2. The structure of claim 1 , wherein the height of the first end panel is less than the height of the first and second side walls.

3. The structure of claim 1 , wherein the first side wall comprises a first side panel and a second side panel, with the first and second side panels each having a first side and a second side, with the first side of the first side panel stitched to the second side of the second side panel.

4. The structure of claim 3 , wherein the second side of the first side panel is stitched to the first end panel and the first side of the second side panel stitched to the second end panel.

5. The structure of claim 1 , wherein each panel further includes a frame retaining sleeve that retains the frame member for the respective panel, with the fabric for each panel stitched to the respective frame retaining sleeve.

6. The structure of claim 5 , wherein the frame retaining sleeve of the at least one panel of the first side wall along its first side is stitched to the fabric of the first end panel.

7. A collapsible structure, comprising:

a first end panel and a second end panel that is parallel to the first end panel, each end panel having a foldable frame member having a folded and an unfolded orientation, with a fabric covering the frame member to form the respective end panel when the frame member is in the unfolded orientation, each end panel further defining a periphery;

a first side wall having at least one panel, a first side and a second side;

a second side wall having at least one panel, a first side and a second side;

each panel of the side walls having a foldable frame member having a folded and an unfolded orientation;

wherein the first side of the first side wall is stitched to the fabric of the first end panel at a location away from the periphery of the first end panel;

the first side of the second side wall is stitched to the fabric of the first end panel at a location away from the periphery of the first end panel; and

the second side of the first side wall and the second side wall are coupled to the second end panel.

8. The structure of claim 7 , wherein the height of the first end panel is less than the height of the first and second side walls.

9. The structure of claim 7 , wherein the first side wall comprises a first side panel and a second side panel, with the first and second side panels each having a first side and a second side, with the first side of the first side panel stitched to the second side of the second side panel.

10. The structure of claim 7 , wherein each panel further includes a frame retaining sleeve that retains the frame member for the respective panel, with the fabric for each panel stitched to the respective frame retaining sleeve.

11. The structure of claim 10 , wherein the frame retaining sleeve of the at least one panel of the first side wall along its first side is stitched to the fabric of the first end panel.

12. A collapsible structure, comprising:

a first end panel and a second end panel that is parallel to the first end panel, each end panel having a foldable frame member having a folded and an unfolded orientation, with a fabric covering the frame member to form the respective end panel when the frame member is in the unfolded orientation, each end panel further defining a periphery;

a side wall having at least one panel, a first side and a second side, each of the at least one panel having a foldable frame member having a folded and an unfolded orientation;

wherein the first side of the side wall is stitched to the fabric of the first end panel at a location away from the periphery of the first end panel; and

the second side of the side wall is stitched to the fabric of the second end panel at a location away from the periphery of the second end panel.

13. The structure of claim 12 , wherein the height of the first end panel is less than the height of the side wall.

14. The structure of claim 12 , wherein the first side wall comprises a first side panel and a second side panel, with the first and second side panels each having a first side and a second side, with the first side of the first side panel stitched to the second side of the second side panel.

15. The structure of claim 14 , wherein the second side of the first side panel is stitched to the first end panel and the first side of the second side panel stitched to the second end panel.

16. The structure of claim 12 , wherein each panel further includes a frame retaining sleeve that retains the frame member for the respective panel, with the fabric for each panel stitched to the respective frame retaining sleeve.

17. The structure of claim 16 , wherein the frame retaining sleeve of the at least one panel of the side wall along its first side is stitched to the fabric of the first end panel.