CC.sound / Industial Design

When I was young, I used to have a hard time talking with my parents because of their working together for a living. However, I would managed to talk with my parents owing to a paper-cup phone play. With this, I could sympathize with my parents and have a conversation with them a lot. My idea results from this situation.
"What if this audio device which would connect between parents and their child for this mutual sympathy were devised?" My conception resulted from a paper-cup phone play is that parents and their child can talk and sympathize with one another with each audio device and then it can enhance communication skills for a child.