I'm very interested in the Chinese Zodiac and since the upcoming year is The Year of The Pig, I wanted to incorporate a pig into my project. I found an easy origami pattern for a rabbit, made it in pink paper and changed the folds of the ears so it looked more pig-like. I just drew the pig tail in after. I used origami paper for everything - and a I used the back of an old Christmas card for the base and just glued the yellow/green paper on top.
This is my first try at an ATC and found that 2.5 X 3.5 inches is a good size to try little projects on. It was a fun project!