Marie uses a pom pom tutorial to make her own pom poms out of yard, but you could easily use pom poms from the craft store (though you won't have the cute little feathers she leaves sticking out at the top). Add some yarn, googley eyes, and paper noses, and you've got your angry birds and those evil pigs.
Marie built the tower for the pigs with paper cups and popsicle sticks. All that's left to do is fling your angry birds at those pigs. Looks like a great way to spend the afternoon. Find the complete instructions and photos over at Make and Takes.
(Image: Make and Takes)