For full directions and an image, visit my blog.
You'll want developed film that has no pictures on it. If you don't use film anymore...I asked at Walmart and they saved me a few rolls from customer goofs--it was free as they would have just thrown it away. Or you can buy film (Buy cheap past date film or dollar store disposable cameras) and have it developed. You'll pay a minimal charge for the developing, but nothing for prints :smirk: