was teaching my 3yo mouse and keyboard this week, and he had some difficulty because he is already accustomed to touchscreen. to be fair, toddlers touch everything, its intuitive. regardless, he was pointing and clicking like a pro after afer minutes.
now, when to introduce the cli...?
No kids myself, but I saw something really interesting at a restaurant the other day. Kid, maybe 3, was watching something on an iPad. When it was time to go, the parents asked "it's time to go, can you pause your movie?"
Kid taps the screen to bring up the menu, and taps pause. No problem.
I found it really interesting that that UI paradigm is maybe 10-15 years old, and it really isn't super intuitive, but it's universal, and this little kid knew how to do it. And it looked like his parents taught him how to do it and encouraged him to do it.
So it isn't all hopeless, it's just a matter of parents teaching kids how to use computers. Just like they teach them to eat, brush their teeth, and dress themselves.