The town of Garmisch is about 10 miles south. They could take the bahn up to the Zugspitze which is the highest mountain in Germany. They could even ski.

Walking around Garmisch is great too. The town of Mittenwald south of Garmisch is known for violin. I believe they made Mozart's violin.

I saw the passion play in 84. It was a special showing. You will enjoy it.