When Your Wallet Says No

Morgan Clendaniel examines Proverbial Wallets, a new project from the MIT Media Lab:

The Bluetooth equipped wallets physically transform depending on your current financial situation: The Bumblebee buzzes every time your bank account updates. The Peacock inflates or deflates depending on your total assets. The Mother Bear ... has a hinge that makes it harder to open if you are approaching monthly budgets.