My current rule is he gets 1/2 hour per day of screen games, plus he might watch 1/2 hour of tv at night. But to be fair, that doesn't include the 20 minutes he might play on my phone while waiting in pick-up line for his sisters. Or the times I hand him my phone in a store so I can finish my errands. Or the times he has used up that 1/2 hour, and I let him sit near me in the kitchen playing on pbskids while I'm busy.
If someone has a system for screen times that seems to work well, I would love to hear it.
How much is too much, and how do you manage it?
