project: face brace
The face brace helps humans to smile more frequently. Originally, I thought to connect hooks to the corners of the mouth, but a better (and slightly less creepy) way of achieving a smile is with electrical stimulation of the facial muscles.
progress: research into electronic muscle stimulation
Arthur Elsenaar has done tonnes of great work on electronic muscle stimulation in the face. He also has an excellent page on safety issues and practical tips like "buy an off the shelf TENS device". Will look into this.