The 30 minute rule: If you tele-work at the moment, and co-live with of the highly connected children, like you, ask them how they perceive you with your screens, and together establish rules of good practice that you will be keen to respect.
For his balance, his ability to concentrate, to socialize, to develop, the child must take down screens every 30 minutes. Remember to program a timer so that this interval is respected.
Explain to them that the eyes get tired when you look closely, and that you have to get used to your eyes to look away to relax them, exactly as one does when walking to stretch your legs after sitting motionless for a long time.
And above all, set a good example and do the same; )