Screen time focuses the senses on a small square and demobilizes the body while putting the brain in a comfortably numb, trance-like state.

It robs a child’s body and brain from developing social and motor skills in a 3D world. Time spent in the trance state is habit forming and is in general stolen from time spent exploring the world, and letting the brain learn from full bandwidth experiences.

So yes, It is the screen.

Children’s real life unstructured full-bandwidth play is learning on steroids. All systems engaged, constant observation, endless questions, simulations etc. think social simulations, physical and motor skills challenges, puzzles. It takes life to prepare human brains for life.