I was in Border today and looking at some origami books. Then saw this book by John Montroll, titled "Dollar Bill Origami". Its interesting to fold using money as its the paper that always in your wallet, unless you only carry credit cards =) Below are some models from one ringgit note. As the one ringgit is shorter in lenght than the dollar, therefore some models don't look like the original design. You can look at the actual models here.