How much do your kids get? To me, "screen time" includes computers and video games.
My kids get an hour after school once homework and chores are done, and they usually choose computer. They're into Moshi Monsters and Minecraft. They then get roughly half an hour of TV before bed. They are 6 and 9.
I ask because I'm beginning to wonder if I should cut back on their time. Last night my son laid down on the couch and CRIED because he asked to go back on the computer and I said no. They play well without electronics, typically role play games like school, house, they'll pretend to be animals etc, or build Legos or read. On warmer days they'll play in the yard or we'll go to the park, but we haven't had many of them lately.
Anyway, I'm not concerned about them not knowing how to play at all. I'm concerned that computer/TV is becoming an obsession and if maybe I'm giving them too much screen time and encouraging it.
ETA: After DS got all his tears out, he grabbed a pile of books and read without fussing anymore. Just the fact that he actually cried over not being allowed on the computer shocked me.