Zodiac.

So I was watching Australia's Amazing Race and they were solving the chinese zodiac puzzle... I too decided to and successfully did it without the clues, just from memory and my family's birth years. Woohoo, successful in another lot of random and unuseful things.
1. Rat
2. Ox
3. Tiger
4. Rabbit
5. Dragon
6. Snake
7. Horse
8. Sheep
9. Monkey
10.Rooster
11.Dog
12.Pig
Amazing the stuff you do in your spare time...