I'd look for a Landry's Brand - there are many in Orlando. We really like the Salt Grass Steakhouse.
And being a Landry's Select Club member gets you great perks.
Regarding "fun for tweens," is Disney Springs off your list of locations? T-Rex and Rainforest Cafe might be fun for them, and parking is free. As far as "unique to the area," we like Columbia Restaurant (https://www.columbiarestaurant.com/celebration) in Celebration, but it's probably not "fun for tweens," unfortunately!