Abstract: A foldable tray having a single sheet of material having lines of reduced resistance to bending separating a central base area and first through fourth side areas encircling the base area, the lines of reduced resistance to bending separating the first and second side areas being curved away from each other adjacent a first corner of the base area to cause the base area adjacent the first corner to curve upward when the first and second side areas are bent upward along their respective lines of reduced resistance to bending, each side area having cooperatively disposed fasteners adjacent the adjacent side areas for retaining the side areas when folded upward about the lines of reduced resistance to bending. a tab with an opening may be provided integral with one of the side areas for hanging the tray for storage or display. Various embodiments are disclosed.

Abstract: A craft kit for making pop-up cards having a plurality of pop-up construction elements of different configurations, each configuration of construction element being provided in plurality, each configuration comprising a sheet-like member with predefined fold lines and selective areas coated with adhesive for joining to a card and to a pop-up element to create motion in the pop-up element when a card is opened. Such a kit may contain multiple ones of multiple construction elements, with or without blank cards, or may simply include multiple construction elements, all of the same design, typically for use as replacements for those used from a larger kit, or of a special or new design not normally included in original kits. Various construction elements and their uses are disclosed.