Smartphones are like the cuckoo bird, which lays its eggs in other birds’ nests. The cuckoo egg hatches before the others, and the cuckoo hatchling promptly pushes the other eggs out of the nest in order to commandeer all of the food brought by the unsuspecting mother. Similarly, when a smartphone, tablet, or video game console lands in a child’s life, it will push out most other activities, at least partially. The child will spend many hours each day sitting enthralled and motionless (except for one finger) while ignoring everything beyond the screen. (Of course, the same might be true of the
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