$Bunny

The snail was quite hard. In the end I had to use a Youtube video to finish it.

$Snail

Ah, my attempted armadillo was hard to make!

$Armadillo

Here’s a shirt, which is supposed to be part of a pantsuit.

$Shirt

And here’s an attempted elephant, (which is not in the calendar). I found the design for this online. ^^

$Elephant

With this next piece I attempted to create Won Park’s $Koi Fish, but I think I got the pleating folds all wrong, so I ended up with this pretty $heart. ^^

$Heart leaning against the $Armadillo to keep it upright

I’ve found using dollar bills very easy to use for origami because they are thick and stern, and they don’t tear apart so easily! 
I won’t be throwing these pieces away in case I ever get to the US and will probably tip restaurants and the like using these $1 bills. ^^

I have US$25 left, so hopefully I can do 25 more designs!

Here’s a great website you can use: 
http://www.origami-resource-center.com/money-origami.html(A-H)
http://www.origami-resource-center.com/money.html (H-Z)
I’m not very good with pictures and diagrams, so I advise watching videos on Youtube and other video-sharing sites.

Good luck!