My Kids (DD6 & DS7) liked:
At Universal - Monsters Cafe. This is a counterservice restaurant, but each room is themed to an old monster movie (Dracula, Creature from the Lagoon, Frankenstien,...etc.). They had pizza, pasta, hamburgers and such.
At IOA- Circus McGurkus Cafe Stoo-pendous (Suess Landing). This a counterservice, but is brightly colored and nicely themed. They have fried chicken, pasta & pizza.
Also, Mythos. When my kids saw it from the outside they thought it was cool & had to eat there. It's very kid friendly if you get a good server & they have neat kids desserts (This is also a good one for the parents!!).
City Walk - Margaritaville (Very Fun)!!
Nascar Cafe (My son especially liked this one)