crypticalias writes: "I have a daughter who is almost two, she loves using my computer (to the extent she can) whenever she gets a chance. I would like to build her a machine of her own and was thinking about which OS to install on it. Windows would obviously be easier to learn but I think learning some *NIX based system would be much better. Have any of you parents out there done any testing of this type of situation? Which OS did you choose and how easily were your children able to pick it up?"