John Kestner & Daniel Leithinger

http://eco.media.mit.edu/proverbialwallets/

We have trouble controlling our consumer impulses, and there’s a gap between our decisions and the conse­quences. When we pull a product off the shelf, do we know our bank account balance, or whether we’re over budget for the month? Our existing senses are inadequate to warn us. The Proverbial Wallet fosters an ambient financial sense by embodying our electronically tracked assets. We provide tactile feedback reflecting account balances, spending goals, and transactions as a visceral aid to responsible decision making.