So we did make it back to Oktoberfest in the evening and saw the lights from the top of the ferris wheel. However, it was raining quite heavy.
And it was still raining the next morning. We left Munich and dropped by the Dachau memorial on the way out. Dachau was the first concentration camp created by the Nazi's and was used for the whole 12 years the Nazi's were in power. It wasn't an extermination camp but rather a camp for political prisoners but it was horrendous nonetheless.
The museum is excellent and most text is in German and English. It was a grey and miserable day which set the mood appropriately. I think its good to expose the kids to how barbaric man can be to each other even in the modern age.