Supplies

1 Box: In the examples I used a wooden box (they are $1-5 at Michael's Crafts), but cardboard or metal boxes work just as well.
Acrylic Paint (Optional): I have found that acrylic paint is cheap and works well but you may find another type of paint better suits the material of your box.
Mod Podge: This is the most popular brand, but any kind decoupage gule/sealer will work.
Collage Cut Outs: You can use magazines, photos, stickers or images that you print out yourself (that is what I did in the examples)

Step 1: Paint Box (Optional)

First, start by giving your box a couple of coats of paint and then let dry completely. If you do not want to add a color then you can skip this step

Step 2: Coat With Mod Podge

Cover your box with a coat of Mod Podge glue (It will dry clear). I suggest leaving the inner rim of the box uncoated so that it is not difficult to open.

Step 3: Add Collage Cutouts

Once you have applied a layer of Mod Podge, secure the collage cutouts to the box and wait for glue to dry. Once it is dry paint another layer of glue over the images.