Create atc base 2.5x3.5 (you will need two pieces the same size. The top one you stamp w/image desired. The bottom one is just for background purposes. Tear/Cut away undesired area around stamped area making sure to leave a border for adhesive. In zippered bag (small ones are found in jewelry making depts of most craft stores). Add 1-2 Tbsp of hair gel, Zip and secure well with tape. Sandwich bag between atc top and base. Viola!
Something extra you can do is add a little glitter or food coloring to the harigel. The hairgel I used already had a blue tint.