Yes, Carnival's kids clubs are generally free for most age groups during standard operating hours. Programs like Camp Ocean (ages 2–11), Circle "C" (ages 12–14), and Club O2 (ages 15–17) are included in your cruise fare and offer a wide range of supervised, age-appropriate activities such as games, crafts, and themed parties. However, there are some specific instances where fees apply. For infants under 2, the "Under 2" program typically charges an hourly rate of approximately $8.85 plus service charges if you leave your child with the staff. Additionally, the "Night Owls" program, which provides late-night supervision from 10:00 PM to 1:00 AM, requires a nominal hourly fee. Specialized events, such as the "Owl Jam" parties, also carry a set cost per child. While the bulk of the daytime and early evening programming is complimentary, it's always a good idea to check the "Hub" app or the daily "Fun Times" schedule once you're onboard to see specific hours and any potential costs for after-hours care.