I’ve read many mixed reviews about this open- air museum and I do have little bit mixed feelings about it myself, but if you have small children or your parents are visiting from abroad it’s a must.
My 2 year old son loved it. There is a little train you can ride around the museum and there are so many fully functional models of trains, boats, funiculars and cable cars that you’re kids are going to be amazed. My mom enjoyed the “walk through” whole Switzerland in one hour and she was astonished by the detail of the miniatures.