They are pieces of plastic like material that have preprinted designs on them that you color or decorate then I believe cut out I could be wrong on that part but then you pit them on a baking sheet and put in the oven and they magically shrink down in size lids love them and they are safe and fun to do for a weekend or rainy day activity definitely something worth bidding on if you have kids or a micky mouse fan or even if you have never done them before it a blast from the past lol