Excessive exposure to screens can slow the development of your child's brain.
When growing, they need interaction with people, that's how they pick up skills, use their imagination, learn verbal skills etc
RT
Using your phone or iPad to stop your child from crying is a bad idea. They get addicted to it and while watching the screen they zone out
No active thought takes place
Allow them physical interaction with other kids as well as physical skills.
Make sure you're aware of what they are downloading off the Internet also.
Monitor use.