Kandersteg is very appealing in the winter time, I only went for 3 nights for the Scout's Klondike Derby, where we did most of the activity on campus but did go skiing for the day at the Skilift Bire. 

I went duing the spring and the veiws are amazing, there are so many different hikes and stunning drives you can do. One of the hikes I did was to the Aescher, this includes and mild up hill hike for about 3-4 hours. After the hike you can enjoy the view along with a drink or meal (they have a restaurant), if you would like there are a few rooms to stay for a night or so. By mid day it starts to get very busy and no seating so come early (11:00 AM).  In the main city there are many cute shops, sport stores, and cafes to browse.