The fine print:
Free nights and restrictions vary by property. Discounts can be redeemed with or without flights. Discounts are based on availability. Discount is not valid with any other offer. Kids must be 12 years or younger to qualify for free child lift ticket. Minimum length of stay requirements vary by property. This offer is limited to one child per adult. Lifts will be issued only for the number of days of lifts the parent has purchased.