| abstract |
A collapsible structure has a foldable frame member having a folded and an unfolded orientation, with a sheet material covering interior portions of the frame member to form a panel when the frame member is in the unfolded orientation, the panel having a top side and a bottom side. The structure also includes a weight coupled to the panel, and a floatation device coupled to the panel. The floatation device can be coupled to the panel at a location adjacent the top side of the panel, or between the top side and the bottom side of the panel. |