I need advice on what booster / convertible car seat to get as a second seat for my 5 yr. old. He's on the small size at 40 inches and only 34 pounds. Since this is for a second car, I'd like to know what would be best and most economical seat to get. I've also got an average size 2 1/2 yr. old that would need a second convertible seat. What would be a best second seat for her?
Currently, they are both in Britax Marathons.
Thanks.