I agree with this suggestion. We sat away from the tanks and a great view of the full tank. Also you don't KNOW how the little ones will react being so close. Hate to grab the close view to have them scream, scamper and have a meltdown there. My 5yo nephew just loved the place, the view, the kids activity sheet and it is the only place where he ate his entire meal: apple slices, pizza and ice cream!
Since they are girls you may also want to consider the PSB meal in Norway. Character meal that includes a photo pacakge in the meal price.
Garden Grill is a character meal, but the in the last year there were a number of reports that place was not rotating, so don't let that feature be a primary decision maker, there is a chance you'll be disappointed.
If you are going by Sept 5th, consider Chef de France for lunch. Remy from Ratatouille is appering there. He's a little guy about the size shown in the movie. Comes to the table as a chef on a cart to the table.
LeCellier is the last place that would come to mind as a place a 2 and 5yo would prefer at Epcot. No entertainment per se and place described as small and dark. Too many other more fun places at that park.
If the girls are dancers they might like the belly dancer at Marrakesh. You'd need to decide if the menu works for you.
I think it will be pretty easy to find a meal you'll enjoy and a place they'll have fun, Epcot has so much to offer.