Decorative structure and method for same

A structure configured to be flat in an unassembled position and to form a three-dimensional structure in an assembled position, comprising:

• a plurality of adjacent panels coupled together along fold lines;
• each panel including a foam core covered on one surface by a flexible skin, the flexible skin being continuous between the adjacent panels that are coupled together for forming a respective fold line for the adjacent panels to be brought together at a right angle to each other along the fold line;
• the foam core of each panel including a mitered surface along at least one edge thereof, the mitered surfaces of adjacent panels configured to form a miter joint when the panels are brought together;
• at least one slot formed in each panel core adjacent a mitered surface, the slots of adjacent panels positioned on opposite sides of a miter joint when the panels are brought together;
• at least one bracket having two portions forming a right angle with each other and configured to span a miter joint between adjacent panels, each portion including a hook portion extending along an edge thereof and configured to slide in a slot of a panel core when the bracket spans the miter joint and to grip the respective panel core for holding the spanned miter joint and panels together in a three-dimensional structure.