Has anyone on here tried this yet? I first saw it on Pinterest and got re-directed to a blog. I was pretty interested in the theory, save all your lame 5's and have some side cash. Sounds easy enough? I figured we could use that money for an emergency, but it's worked so well that we're trying to start saving to buy a car. You can read about it here:Please Log In to view this link! To sum it up, you can only spend your bigger bills and save all your $5's for the '$5 jar.' My hubby and I started doing this back in October 2012 and we were able to save $500 in 3 months, which is pretty decent for us considering we live on one person's income. We also suck at saving and this makes it fun, we get competitive over who gets to put in the most 5's(haha.) Anyways, I'd love to hear about anyone's experience with this and if it worked for your family.