Hi Trudy!
Thanks for your question and for visiting the Disney Parks Moms Panel!
The answer to the question of "monorail versus boat?" really depends on from where you are talking. I will assume that you are asking about arriving at
Magic Kingdom as that is the only
Disney theme park accessible by both of those
Disney transportation options. I will further assume that you will be travelling from the Ticket & Transportation Center either across (
by boat) or around (
by monorail) Seven Seas Lagoon to Magic Kingdom.
I believe that it is both easier and faster to board a ferryboat across Seven Seas Lagoon. The boats are huge and more guests can be accommodated for the journey. PLUS, I like going up on the top deck and being outside to take in the view as I approach Magic Kingdom. It really sets the mood.
From the Ticket & Transportation Center, the "express" monorail is a fun way to get to the park, but it carries less guests and may not be as quick an option in my opinion.
I hope this helps and I wish you a Magical trip!!
Chris