Callum is currently in an old style Marathon. Eleanor is in an old style Roundabout (which she's about to outgrow and that will also expire soon). I want to keep E rear-facing for at least another year. Callum is FF.
I'm thinking I should move E to the Marathon and get a new seat for Callum (want to keep him harnessed. He's an average height 4 year old and probably about 37 pounds?
What would you get?