We've all done it. Picked up a couple of dolls and acted out a scene. Maybe you played with Star Wars Legos, or your Barbies, or your stuffed animals. Your toys fought with lightsabers, went to work, ...

A child sitting with a tablet may look calm, even “well-behaved.” But what is happening inside the brain tells a very different story. A growing body of research now suggests that simple toy choices, ...