Touch screens and children: helping or harming?

For parents a pretty constant dilemma is how much time should the kids spend looking at a screen? How much is too much screen time? And what about the pre-schoolers -- is it OK for a four-year-old to play interactive games on a smart phone or iPad? Could a small person’s brain be harmed or helped by playing games on a touchscreen device? New research might provide some clues.

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