coreybox said:If it wasn't sarcasm (which i don't think it was) i would suggest getting a used iBook if anything. A four year old in no way needs anything super powerful, and it would be able to run all the classic apps (or OS9 if you get an old enough one).
I also think a laptop would be easier for a child in that everything is right there, and they could play with it in bed or in the living room.
Im sure you could pick up one pretty cheap, or at least cheaper than a new mac mini package (monitor, keyboard, all the stuff you would need to set up a new computer station).
A 4 year old does not need a Mac Mini, an iPod, or a laptop. A 4 year old needs a ball and the box that their parents Mac came in. Anything else is spoiling.