I let my 3 year old play with my laptop at times, by giving her a full screen xterm running bash in a separate tab on my tiling window manager. She mostly likes to type the letters she knows (her initial, my initial, uncle's initial etc) but it's surprising how often she manages to Ctrl-R or Windows-Shift-3 or some other combo that makes things go haywire.

I hope she's not called Rebecca Mary-Rachel Ford ...

And has a cousin named Star.

Haha! Fortunately, her initials are not all in ASCII, so it's not gone wrong yet. But true, I should set her up with a user account that doesn't have write access on anything.

Install sl(1) and teach your 3 year old to type s l ENTER :-)

Boy, am I going to regret installing this in about an hour.

I told my 2 and a half year old that the "S" key is the snake key, so now he always asks "can i press snake?". He's also found a second snake (the 5 key).

When he finds the '@', he's gonna be delighted!

Your cat is talking at 3 years old? Very advanced!