If you're feeling extra fancy, you can make them all black and white before printing them out. Get the super-simple how-to here. It uses mini clothespins, but normal-size clothespins would totally work, too.
Bender Photo Collage - I used a x canvas with blocks of Think quilt blocks. Glue pictures on with Elmers glue leaving a small border between. I nailed (every 12 inches or so)the canvas to wall behind random pictures to keep it s