German Culture Class Expectation

I had gone to Germany many years ago, not knowing nearly as much as I thought I did! I have a passion to go back, and to take my family with, since it's part of our heritage.  In order to do this I need to understand how Germany was, how it is, and all the fun stuff in-between (maybe not all fun). I want to be knowledgeable when I go back so I can better understand and experience all Germany has to offer.