we were in pamps at xmas our ski instructor was happy for a 4 year old to be in our group only stipulation was if she couldnt keep up her mum or dad had to take her out of the leason. She did better than some of the adults and stayed in the class all week only on the last day did she finish early, non of us minded. the other children in the group were all under 9 so think it depends on your instructor Iam sure if a good tip was involved would be quiet happy for them to go in class