I've been invited to give feedback to all Parsons students, regarding your thesis projects.
Safe Voice is a compelling project idea. It's all too common that curious children will indeed "learn through burning" ... and then never touch a hot surface again. But you focus on prevention, pre-emption and proactivity. All of these are strategic and come together to improve the likelihood of changed behavior (without harm).
You would do well to give more detail on how the sound and light technology work together, and how the parent records his or her voice into the system. Also, how do parents get access to this product? Where would it ideally be sold? Who could sponsor its development and distribution?
The idea is fun. Good luck with it! J.