Pick out a variety of tissue paper colors. You can cut them into squares ahead of time, which might make the whole process go a little more smoothly during the sticky part. The size of the individual tissue paper squares depends on how you would like your stained glass to appear.
Once you have your tissue paper ready, it is time to mix your paper maché glue. By the way, if you don’t want to mix your own glue, you can buy some premixed in a hobby store.