Long time ago I got a dell mini 9 inch and the kids kind of like it but the keys are really small, so is the screen so there wasn't a lot of love. Then we lost the power adapter and it sat idle for a long time. Probably 6 months. I found a replacement power cord on ebay for about $7 and now we can use it again.
it came with XP but that was running slow so I installed ubuntu on it to try and make it more interesting. I think it worked. I kind of have fun with it. Just a toy so far and really it will probably be that way for ever cause it is so small.
Back to the point. I want it to work right when I logon which means I want some stuff saved as part of my user profile, but I don't want the kids getting on to my stuff either.
We added one user from the command line. My son actually did that, good job buddy! I found an article that shows how to do it via the gui interface:
System Settings, System, Users and Groups