The physical features of teenage kids change to catch up with their brain circuits ready to take on the pre-historic hunter-gatherer roles. The goal: resource mobilisation for survival. Resource mobilisation would not only help them survive but also to earn them invisible rewards by way of positive brain chemicals and electricity. However, the post-industrialisation scenario has been quite different. Teenagers get groomed via skill- or academic development to take on economic roles latest by their mid-twenties. Such grooming strategy does not always lead to the invisible rewards which they would have earned had they been playing their pre-historic hunter-gatherer roles. Most interestingly, today's versatile digital gadgets offer ample scope for earning brain rewards at the cost of sedentary lifestyles. The prevailing work-and-study-from-home culture has prompted the teenagers becoming dependent on digital technology and getting addicted to the gadgets for earning rewards. There is thus a new need for the parents of today's teenagers. They must smartly lead themselves and their kids so that digital technology is utilised for their healthy all-round development thus preventing any possibility of addiction.