Here is a smart wearable device that shocks you to force you to smile. It has 5 electrodes that are placed on your face. Two of them monitor muscle movement while another two shock you. The system is powered by an Arduino, a Muscle Spiker shield and a TENS unit.
Jolly Tracker is controlled from your smartphone via Bluetooth. It counts how many times a minute you are smiling. What do you think? How would you improve this device?