Artsy Fartsy Mama has a tutorial for doing this using a plastic takeout box as the plastic, but if you have shrink plastic sheets in your house of course you can use those, too.
Kids can draw their own designs (or I love this idea for using coloring pages to make charms from Jennifer Perkins), color them in and shrink them down in no time at all. Remember to seal them with Mod Podge or another sealant to make sure the colors stay where you want them when they’re done.
Check out the post on Artsy Fartsy Mama for all the details.
[Photo: Artsy Fartsy Mama.]