I LOVE The Idea Room. LOVE LOVE LOVE her blog. I went on there today to look for her embossed candle tutorial, and came across this in the craft section! I've seen these before, but didn't know how to make one. I thought it was a sticker or something on the front. I had everything I needed already on hand.
Laser Jet printer
Transparency (leftover from these)
Clear Soap Bottle
That's it! Our laser jet printer has issues right now. It prints a long black line down the front of each page. Usually we use our ink jet printer, but for this project it worked great since the area being printed was only 3"x4". If you don't have a laser printer, you can go to Kinkos and they'll print out your page on a transparency for usually under $1.