Back when I worked retail, during my first performance review, I was told that I never smiled. I had lighthearted conversations with customers, and generally seemed chipper, but I never smiled. All I could say in response was “I thought I was smiling.”

Happiness Hat by Lauren McCarthy fixes that. …through training.

That’s right, it’s a behavior modifying device that keeps you smiling by stabbing you in the head with a metal spike whenever you’re not.

[via Make]