Digital vegetables can be a healthy use of screens (researching a term paper), while digital candy (Minecraft, Candy Crush) are hyperarousing and dopamine-activating digital stimulants without any ostensible 'health benefit'.

Brain-imaging research is showing that glowing screens - like those of iPads - are as stimulating to the brain's pleasure centre and as able to increase levels of dopamine (the primary feel-good neurotransmitter) as much as sex does. This brain-orgasm effect is what makes screen so addictive for adults, but even more so for children with still-developing brains that just aren't equipped to handle that level of stimulation

That's right - a kid's brain on tech looks like a brain on drugs.

One professor from MIT made the passionate plea that we must encourage children to develop the ability to think first, and then give them the computer. After that, the sky's the limit. But if you introduce the computer before the child's thought processes are worked out, then you have a disaster in the making