I very much enjoyed a bike tour of Munich (I went with Mike's Bikes but I'm sure there are others)-- it was a great chance to see the city and get a little movement. The ride is very slow and flat and covers several interesting places. We took little stops at the standing wave to watch the surfers, stopped for a beer in the English Garden, and got a mini lesson at several historic places. If your family is up for a little bike excursion and the weather is nice, it's a great way to see the city.