Hi Wendy!
Thank you for visiting the Moms Panel!
A first visit to Walt Disney World Resort is a very exciting trip to plan, and there are many decisions to make!
For a character dining that your son might enjoy, I would thoroughly recommend
Chef Mickey's at Disney's Contemporary Resort. This is a fun, lively experience featuring Mickey, Minnie, Pluto, Goofy and Donald, and will be enjoyed by the whole family. There is also the opportunity, before your meal, to have a family photo, which will be delivered to your table (it is your choice whether to purchase or not).
For a cool experience, how about
The Pirates League? This takes place at Magic Kingdom park, and your son will be transformed into a pirate! Reservations can be made by calling (407) 939-2739. Please note that theme park tickets are required.
If you have any other questions, please come back and ask me - I would be happy to help you plan your first magical vacation!