Are Children Welcome?

Absolutely! That's the main reason for $20 per-youth discount for 17 and under and for the discounts for very young children
Discounts for Children 

• 0 to 23 months old at time of travel don’t have to pay
• 2 to 3 years old at the time of travel have to pay airfare ONLY (Land Package portion is free)
• 4 to 6 years old at the time of travel have to pay airfare + 1/2 land package
• 7 years old at the time of travel and older pay in full

There are also other ways to save! See also 'Save on Your Trip'!