There are numerous things to do apart from skiing in all of our resorts. Non skiers can join ski-guiding groups for lunch as the Ski Miquel ski guide will aim to meet at a mountain hut that is accessible by everyone. All resorts have snow-shoe/walking trails and nearby slopes for sledging. Some have amazing purpose-built toboggan runs ( be careful as they can be VERY fast).
Just a few ideas of other activities...
Bad Gastein: Thermal baths, horse drawn sleigh rides, visit
Serre Chevalier: Thermal baths, visit Briancon, snow-buggying
Montgenèvre: visit the dramatic walled town of Briancon, try the Luge Monty Express - a sledge attached to a monorail that runs 1400m down a 300m descent reaching a max speed of 60km/h
Lauterbrunnen: try the fiendishly tricky curling in Wengen or brunch in James Bond style at the Schilthorn revolving restaurant. Try the FirstFlyer zipwire experience where up to 4 people whizz 800m at a top speed of 84 km/h up to 50m above ground or even the First cliff walk in Grindelwald.