Liv and I made these fun shamrock pins other day in honor of St. Patties day. It's really a simple idea, and it can be adapted for just about any holiday. They look like they've been coated with UTEE (Ultra Thick Embossing Enamel) but really it's just a thick spray glaze.
What you need:
--chipboard (I pulled a cream puff box out of the recycling bin. Yummm....)
--newspaper scraps
--die cut machine that can cut chipboard. I used a Sizzix with a retired shamrock die. Really, I don't suppose you *need* a die cut machine, but it does make it super easy to cut shapes from chipboard.
--Decoupage medium. (I used Aleene's, but that's just because my Mod Podge wasn't handy at the moment.)
--acrylic craft paint
--Deco Art Triple Thick Brilliant Gloss Spray (I love this stuff!!!!)
--pin backs
--strong adhesive for gluing pin backs. I used E6000
So here's how you do it:
1. Cut the newspaper into thin strips. You don't need very many, just enough to cover the piece of chipboard.
2. Coat the chipboard with the decoupage medium and lay the strips down, covering with a second coat.
3. After you've covered the whole piece of chipboard with newspaper, paint the newspaper with a thin coat of acrylic craft paint. I used several different colors of green and mixed them together here and there. You should be able to see the newsprint faintly through the paint. 4. Wait for the paint to dry. This could take a while so go do something fun while it's drying.
4. Now here's the fun part. Use your die-cutter to cut out a bunch of shamrocks from the painted chipboard. Then, spray the shapes with the Triple Thick glaze. You'll end up with some very shiny shamrock shapes. 
5. Now, just glue a pin back on to the back of each shape.
Voila! Shiny pretty shamrock pins.
