Disney Cruise Line and beyond: The best cruise lines and ships if you're bringing your kids

Once it was a struggle to find ships that were kid-friendly, now the challenge is wading through the bevy of child-friendly activities, kids clubs and family cabins to determine which cruise ships are best for your youngsters. To make decisions even trickier, ships vary greatly, not just from line to line but within fleets, making some better than others in terms of onboard activities.