We took our kids to the Alpine Zoo (alpenzoo) near innsbruck and they loved it. We also spent some time in Oberammergau where there is lots of touristy stuff to do -- We took a carriage ride. Mostly my kids remember the ice cream. Kids are weird. (The ice cream shops seem to have lots of different weird little sundaes with different colored sprinkles and things.)

Check out this thread: https://www.dcurbanmom.com/jforum/posts/list/1247712.page#29086345

My kids loved the parks/playgrounds (very different from US) and the Eagle's Nest.