Step #1: is to cut out a lot of pictures from magazines...you can also find and save pics online & print them out..I also got my son to draw some of his favorite characters to use...like Sonic the Hedgehog.
Step #2: is deciding where & how you want to put all of your cut outs together...it's like a puzzle. Decoupage- is the art or technique of cutting out pictures or designs from paper or other material(like fabric) & applying them to a surface(like wood, glass, metal & ceramic). Covering up all of those little spaces you will be overlapping pictures but that's alright..it looks good that way.