Baby Proofing CPU

Is there anything out there (aside from putting the computer in a cabinet) to cover the face of your cpu so that little hands cannot mess with the buttons, slots, plugs, etc.?

I so said that my son would not be allowed in the office, but he has to be sometimes and
I can see already that Aidan is determined to crash my computer from the bottom up

Thx

I don't have that problem yet but just an idea I have seen they have little laptops for kids with kid games and thing s for the kids to work on in Toys R Us what about setting up a litle desk for the children and put their computer on that and they may feel important as well.

Jennifer