Have taken my two every year since the youngest was 5, eldest 7, get them in ski school, gives you a few hours to go off, then you can spend the afternoon together, tobogganing , chucking snow balls or just sliding down the bunny slopes on your bum!!
Just a thought Norway is excellent for kids, slopes are incredibly quiet, instructors speak perfect English and are very friendly, no queues and the slopes have plenty of snow, and loads of other things to do.