I wouldn't be surprised if your kids wanted to look out the window - I know I would as a 5 yo!

If they're well behaved enough to be seated across the aisle from one of their parents, how about the entire row 4 or 5? Or 4 A/E (F/K) and 5A/E (F/K)? Then at least someone will have a chance at a window seat at some point.

Come meal time you can always use the buddy seats (esp. nice if you're in the same row: all huddle in the E/F seats and eat together).