Hello Man Ting,
The Disney Dream is a magnificent ship! You'll be amazed at how much there is to do onboard for adults, children and families.
You say your daughter is 4 years old; she would be going to the
Oceaneer Club and Oceaneer Lab. Those clubs are for children 3 to 10 years of age. They are amazing fun and my children have always loved the youth clubs on Disney Cruise Line. You can leave her there under the supervision of very well trained counselors. You will be given a pager in case they need to contact you for any reason, and you are welcome to come and visit your child whenever you'd like.
Go ahead and enjoy your free time! Enjoy the adults only pool,
Quiet Cove Pool, spa treatments at
Senses Spa & Salon, and please don't miss the spectacular adults only restaurants, Palo and Remy! You can reserve spa treatments,
Palo and
Remy online or by calling Disney Cruise Line.
I hope this helps. If you have any other questions please let me know. Bon voyage Man Ting!