Counting dollars and cents on the checkout counter really makes you feel the weight of every expenditure. Swiping a credit card or waving an NFC device over a sensor? Not so much. Enter the Proverbial Wallets from the Information Ecology group at the MIT Media Lab, three separate devices that use three haptic techniques to curtail your spending. First is the Bumblebee, which buzzes and vibrates whenever money comes into or goes out from your account. Next is Mother Bear, which becomes harder to open as you get closer to your spending goal. Finally is Peacock, which swells proudly as your bank balance does the same. Sadly none o
