This seems more like something Batman’s Joker would use on unsuspecting Gotham residents, but it was actually created by a Japanese inventor. It’s called the Electro Smile. The device hooks onto your child’s face, then constantly sends electricity to your child’s cheeks, triggering the muscles to make them smile.
Creepy huh? It has an adjustable current, so even the most stubborn kid can be made to smile. This is definitely the work of a Batman villain. Why the long face son? Zap! he he he ha ha ha.