How big is your 6 year old? I am guessing that seat is almost expired. Remember most seats expire 6 years from the date of manufacture not date bought. How much room does your 4 year old have in her seat? Remember most seats are outgrown when the shoulders go over the top slots or the tips of the ears go over the tops of the seat.
What seat is your
How big is your 4 and 6 year old? Honestly I have never seen a child over the age of 4 that
How tall are they? Usually the Scenera is out grown by height before weight. They must be short in height as well. Are they considered little people? Just curious as that would make sense. I think as little as your kiddos are the Nautilius is over kill. The Evenflo Maestro cost less and has about the same harness height as the Graco Nautilius. I would get that for your 4 year old. Dawn