I'm planning a trip to Germany the 27th of this month to visit my daughter and 2 young grandchildren (ages 1 1/2 and 3) I'll be there for 28 days. I'll be flying into Nuremberg, they live in Grafenwoehr. I know there is a large zoo in Nuremberg...is there anything else that would be fun for 2 small boys? Is the zoo too big to see everything in 1 day? Any information would be greatly appreciated!