[LitFan]

I don't think you need to worry too much. As has been said in this thread, electronic devices and the software running on them are designed to be addictive. Young children lack the self-control to limit or stay away from things they're addicted to.

You'll be doing just fine if you lay down some boundaries for them limiting the time they spend on any one activity. Bonus points if you take part in those activities with them. :)