So...using basic computer software to make letters and pictures on obscure objects is possible while not spending too much money.
All you need is : a printer, colored ink for that printer, some clip art from Microsoft word and time to sit down to cut in minute detail (sure, it takes a lot more time than those awesome slightly coveted products referred to above, but sometimes it's nice to sit down and cut things out, right?).
You can see the bubble from the tape on this "Y" but I wasn't going for perfect, just fast, easy, and fun!
Shamrock from Clip Art in windows.
Wondering about those cute paper shamrocks? Check out how to make them at sugarbeecrafts. She has tons of fantastic ideas and creative ways to decorate!
The white strip is Styrofoam that came with a recent house project. I covered it (above) with some green and off-white fabric that I found at a garage sale.