Welcome Aboard, John!
Thanks for stopping by with your question. I'm excited to hear you and your family will be sailing the high seas with Captain Mickey for a third time!
While in the past, your daughter was allowed into the Oceaneer Club before turning three, we recently received an update on
Youth Club ages from Disney Cruise Line.
Their official policy states:
All children
must be 3 years of age or older
and potty trained (able to use the restroom independently) in order to participate in Disney's Oceaneer Club and Lab. Children 3 years of age (who are not fully potty trained) and younger may visit Flounders Reef Nursery onboard the Disney Wonder, or “It's A Small World” nursery onboard the Disney Magic, Disney Dream and Disney Fantasy.
I hope this helps answer your question. Please let us know if you have more questions as you plan your Disney Cruise - we're happy to help! - Diane W.