These are so easy that you don't need a tutorial. Just cut out 5 inch squares of fabric (these are 100% cotton flannel) and sew them like you would a bean bag. Instead of beans, fill them with rice. When you need to warm up your hands (driving to work in the morning or shoveling snow, etc.) Just pop them in the microwave for a minute. Toss them into the pockets of your coat and use them to warm up your hands.