we had a 2 year old grandson who was not potty trained on a cruise last year. He loved all the musicals in the evening. Lots of characters on stage too. Babies seem to love music. We also had drypers so he could play in the mickey ear at the mickey pool. One just has little jets of water for toddlers to lay and you can sit on the edge of the ear to keep a close watch on your child. The other ear has older kids. the edge of the pool is only about 4 inches deep and you could hold his hand and wade in it. There are toys in the nursery too, but you have to pay for the babysitting service, and it is limited space, first come, first serve, of course you wont be with him. If he likes characters they have meet and greets everday. Mr, Toad race you can sit with him on your lap and help him make his frog jump towards the finish line. Lots of parents help their little ones do that too.
Have a magical time.
mom x4,grandma x4