I think '50s PT is a lot of fun, but when my kids were young they didn't "get" it. We went when they were 7 and 5 and they just didn't quite understand what was going on.
'Ohana has some fun stuff during dinner. Coconut races and hula lessons and strolling singer.
1900 Park Fare dinner with the stepsisters and Lady Tremaine is absolutely hysterical! Those three play it up so well. Loved it! (But I haven't been since menu changes I've been reading about)
Both T-Rex and Rainforest Cafe have fun elements. We have Rainforest here, so never been at Disney but did really enjoy T-Rex.
BOG -- don't know if I'd call it "fun" but it's very interactive. Sit by the window and watch it snow outside. Or eat in the library and watch the beast appear in the painting and the lights flash, etc.
Sci-Fi is definitely cool with the old movies playing and the drive-in atmosphere. But it's very dark. Personally, I need to see what I'm eating!
Pinnochio Village Haus at MK is a QS meal but depending on where you sit, you can be right above Small World and watch the boats going by.
Teppan Edo at Epcot is a fun presentation and very good food.
Of course, there's all the character meals but I'm assuming you're looking for other ideas.