While your glue gun heats up, carefully remove the kickstand, cardboard matting and glass from the frame.
Power up your glue gun and set to the side to heat up.
Secure the glass pane by placing a small bead of glue in each corner of the inside of the frame. Gently press the center of the glass. Repeat on the other three frames.
Glue down one 7" side of a frame and press to the 7" side of another frame to create a corner. Repeat on the other two frames.
Apply glue to the outside sides of one of your frame corners and press together to form your box. Once completely dry, decorate to your taste!