I remember playing on the PLATO system a few times as a single-digit-year-old. My parents were grad students at UIUC. There was a game called ANTWAR. You would

I remember playing on the PLATO system a few times as a single-digit-year-old. My parents were grad students at UIUC. There was a game called ANTWAR. You would be shown an army of enemy ants in a rectangle in a certain number of rows and columms. The trick was to multiply the rows and columns and choose the size your army to be exactly one more ant in number. They don't let kids hang out in datacenters anymore. But kids have more interesting games at home anyway.