I just posted about this on another thread! My DS 5 didn't do it on the computer instead made it all verbal. I am not sure what I was supposed to have done to "ensure" he use the crayons, but mine also chose other avenues and it has an affect. I don't think there is a problem per se with electronics, DS loved starfall. But my lack of interest in cleaning paint led to a kid who just doesn't do it. I allowed him to avoid learning to do something which now created an asynchrony which frustrates him. Not that a 5 yr old should have the writing capability which matches his way out there verbal and science comprehension, but to be so far off from his other skills upsets him. So seconding Grinity here, in and of itself I don't think it's a problem but when electronics, or reading or anything else is so dominant that the fine motor isn't getting enough attention I would say put some limits on it.

The other thing I would say is that watching a lot for some reason leads to more proscribed play, if it's character driven, like the sites which go to tv shows. Personally I find kids that get super into the characters seem to allow the characters and their rules and setting control their play. I like to see the play as an amalgam of all their inputs
not dominated by one source. Not sure if this is true across the board but it seems to be.

DeHe.