Keep in mind that Citrico's is upscale and the pace of the meal reflects that. This is not an in and out in 45 minutes resturant, I don't think we've ever dined there in less than 1 1/2 hours. It's usually closer to two.
I don't feel it's a practical restaurant to take children to. There are many other fine dining places at WDW that are more kid friendly, and better for families with younger kids.
Narcooses, Jiko, even the California Grill would be a more suitable place to dine with younger kids like yours IMHO. If for no other reason the ambient noise level is louder and the atmosphere is more "bustling" so your kids are less likely to be noticed if they get a little loud or squirmy.
I'm taking an eight, five and one year old in two weeks. We are not dining at Citrico's with them, although we are going to the other places I mentioned with them.
Anne