We drove into Austria and Lichtenstein in our rental car while staying in Switzerland. 
Strolling around a town in Austria (Schlossberg?), shopping and eating was relaxing after spending energetic days on the Alps hiking and doing the alpine ride.
We had quite a bit of schnitzel in Switzerland and the boys were ready for some other cuisine. I think we even had sushi in one of those countries which seemed funny to us, too. Schnitzel is a boneless meat that is tenderized, breaded and fried. http://allrecipes.com/Recipe/Schnitzel/ . The pastries and bakeries were a welcome sight when we craved a snack and energy boost from all the adventure and hiking! 
The view of the Alps is really that grand and the air is so clean and crisp, you get mesmerized taking it all in.
I didn’t realize, until this trip, that the Alps are the highest mountain range covering the large area all entirely within Europe. The Alps border the following 8 countries: Lichtenstein, Austria, Slovenia, France, Germany, Italy, Monaco and Switzerland. Try this arts and crafts project to tie in a unit about mountain ranges. http://www.ehow.com/how_6467308_make-mountain-crafts.html
Time should be built in to see any of the following in Salzburg:
- Sound of Music Tour in Salzburg
- Ice Caves and Austrian Lakes
- Bavarian Mountains and Salt-Mines Tour from Salzburg
Follow this lesson plan to build trip itineraries with your family: