Well, 50's Prime Time Cafe at MGM and Whispering Canyon Cafe at WL are both a lot of fun and very interactive with the diners. However your kids are at a tough age and only you would know if they would find a lot of kidding around and picking on the diners (in a nice way) --fun. When my kids were young teens, my DS did not care for these restaurants at all, my DD was better but they still were not her favorites. Now that they are adults my DS still does not care for the atmosphere in these restaurants but DD now enjoys both 50's PT and WCC.
When my kids were teens their very favorite WDW restaurants for atmosphere was House of Blues and Planet Hollywood. For park atmosphere & dining they liked Cal Grill for MK fireworks viewing and Rose & Crown for Illuminations viewing.