I remember years ago when my mom would save the styrofoam meat trays and we would make shrinky dinks. Take a white meat tray and cut it in half if you would like. If you want a hole in it, punch one before you put it into the oven. With Sharpie,Crayola markers or colored pencils (not crayons) have your child color the tray. It is ok if you color on the sides, it will all flatten out in the end. preheat your oven to 300 degrees. On a piece of aluminum foil, place your colored tray and put into oven. This whole process will happen in about a minute or 2. Watch constantly! The tray will curl, l flatten out in the end. I put a quarter next to the tray in the beginning and end to show you how much it shrinks. The kids have fun watching it in the oven.