There's a banner kit you can buy that comes with a fabric (light canvas) banner and a round tool that the banner goes in so the characters can sign it (tool has a hard backing so they can sign on the soft material). It comes with some markers and a carry case too - we took one several trips ago and went on a serious character hunt - we got so many autographs and now we've added tons of pins to the banner and it hangs in my daughters room - we have so much fun looking at it and remembering our past vacations
Many face characters commented that they thought it was great and even others motioned about it (Mickey gave the thumbs up!). We loved it and highly recommend it for making an awesome keepsake!! Although I would suggest bringing some of your own markers for quality and color variety (it came with only 3 markers that were "no name" so I was afraid to bring them and risk them drying out).