In the supermarket, and there was Sim City (or was it classic?) Either way, it was cheap and looked cool. Picked it up for my Windows 95 machine, in 5th grade I think. Played it for HOURS on end, then found the function to make your own map. Not that it was very good. But the game was good. I remember exactly what you could build, and you could only build the one size. Always tried to keep the city square, with roads surrounding each property.
To those who have never played Sim City, play it. Im sure there is some free ware of it on the net. Gets you a good root for what we are playing now.
Sim City also led the way for Sim Tower, which I still think is one of these best games to come out for computer.