I really do understand parents needing a breather, but kids can learn to entertain themselves with crayons or clay. Kids brains are developing rapidly in conjunction with their immature central nervous systems. Active play that engages their senses is critical to optimal development. Passively sitting in front of a screen while their brains are hyper-stimulated agitates the central nervous system without catharsis and sidelines the learning process. Let kids be bored and channel their imagination as much as possible. A good read on this topic is The Shallows by Nicholas Carr