I've been playing for a little over a year now and my seven year old is now hooked. We were playing each other in a hotseat game with eight civilizations. We had each chosen one and let AI take the rest. After one turn my arrow cursor turned into a red circle that went from large to small over and over. Finally I clicked on a city and it turned the red circle into my normal pointer cursor. The city now looks "different" from my other cities. It has not revolted, in fact, hapiness is at 80. Can anyone tell me what has happenned? I thought it may be a celebration but usually the information tiles give me the red exclamation point to indicate one is happenning. Thanks for solving the mystery.