My youngest Grandchild - a boy- will not talk on the phone - any phone. He wants an Iphone or smart phone only to play games. His Mom won't go along with that. He plays all kinds of video games, he is in the gifted program and reads at a college level, very smart kid. He is becoming an avid WWII expert.
Your Grandson is very cute, I love those red curls. I would keep the phones out of reach.