hi
just wanted to recommend chalet neige apartments in oz en oisans. we went with 22 people- booked lots of apartments and had a great time. Resort is car free so kids can just walk around safely- is tiny, so can't get lost, can ski to door, has a nursery and ski school, and lifts link really quickly to alpe d'huez so is masses of skiing.
took ages ranging from 18 months to 50, with beginners to off pisters. very quiet so not much night-life to worry about what teens are up to- all met in bar at end of day, then either got pizzas together or cooked - will be going again!