To make this, all you need is a box with a bottom and sides, and paint. The box I have is a de monte banana box. You can use the bottom to store your items. Or put nails in the box for hanging things. I just didn't want to mess up the picture.
Step 1: Design
Design your image on the inside then if it will be a light color, paint it white first.
Step 2: Paint the Background
Step 3: Paint the Image That Was White
It should be dry by now so go ahead and paint the image, mine being the sun. Since yellow is a light color, I pained it white first
Step 4: Paint Sides and Framing
Step 5: Put Stuff in the Box.
Like said before, you can screw nails into the box for hanging items but I wanted this to double as an artwork so I didn't poke any holes.