You can check the menu over on All Ears to get an idea what might be served. If you're semi adventerous in your eating, you should really like it. The desserts were to die for! We really enjoyed our meal there and even the non-adventerous types found things they liked!
Boma is our favorite WDW buffet. Everyone in our party always finds plenty to their liking, even the younger children. Like most WDW buffets, there is a kids area with standard comfort foods like chicken fingers and mac & cheese.
Enjoy!
No need to be nervous about your 5 year old. There's a kids section on the buffet with spaghetti and meatballs, mac & cheese and chicken tenders. There's also fruit on the buffet, and carved meats, and bread. And loads of amazing desserts. Plenty to make a meal out of for a little one.