[jasinjames]

My SO is a Occupational Therapist, so she spent part of her master's degree studying pediatric development milestones. A LOT of those milestones (ability to handle objects with hands, develop muscle strength, resolve conflict with others, etc) depend on playing with other kids in the real world. If a child is proportionally spending more time on a device than interacting with peers, they're going to have problems.

Prime example: W-sitting. Lots of "iPad kids" have an unusual sit pose where they splay their legs out. Oftentimes it's because they're sitting on a device so often that their core muscles are underdeveloped.

[njtransit]

My daughter sits in a W pose and has since she could sit independently. She never uses an iPad or other device. The doctor said it’s due to having flexible hips. Just an anecdote.

[giraffe_lady]

What age kid are you talking about? I remember preschoolers doing this before wifi existed but maybe you're talking about older children that would normally have stopped doing it?