Ever got tired of greeting strangers (people you dont know by name) in places like Work, church, etc. How about Automated greeting? you simply record your voice saying "Hi How are you?" or just "Hellow" and transfer that audio to small mp3 device that is attached with to a spy speacker the size of an average knob and have the activation button on your pocket so everytime you dont feel like saying Hi or you dont feel like opening your mouth, you just press the button looking the other way and pass bye!
Reward: 50% per device sold