Need to transfer game files from old phone to my new S3

[DragonGyld]

My son's Galaxy S3 has been having charging problems, so we got the new phone. He has a couple of games that he trying to transfer the data to the new phone. I saw your instructions about needing to root the phone, but he is unsure of how to do that. Can you tell us how to do that? He doesn't want to mess anything up. Thank you in advance.