From http://www.s3v.com You don’t have to ski together by the way!
*SPECIAL INTERNET OFFER, this winter*
*2 Adults plus 2 children minimum from 5 to under 21 years old – Instead of 5/-18 years old if the Family Pass is purchased at the resort ticket offices*
*This offer is only valid on Internet – The age limit for Family Passes purchased at the resort ticket office remains from 5 to -18 years old*