January 2015 - last edited January 2015
Have you synched your city to a GameCenter or Facebook account on your first iPad? If so, you should be able to play with the same city on your second iPad. All you have to do on your second iPad is download the game there and then play through the tutorial. After that you should be able to sign in through your GameCenter/Facebook account and access your game on the second iPad.
Or have you tried this and are having issues?