I have a 4 year old who is currently in a britax marathon and is quite comfortable in it. he is just about 40" (about a mm off) and was 35lbs back at his february check up, so probably a bit heavier now. I'm wondering when should we think about moving him to a booster.
The reason I'm starting to wonder is because my 2 year old twins are both in britax roundabouts and I'm guessing by the winter, at the latest, one of them will have outgrown the roundabout and I'd rather not buy another marathon if I can just shift the 4 year old to the booster. (the other twin is teeny and has trended that way, I don't expect her to outgrow the roundabout for a long time to come).
Any ideas from btdt moms?
The reason I'm starting to wonder is because my 2 year old twins are both in britax roundabouts and I'm guessing by the winter, at the latest, one of them will have outgrown the roundabout and I'd rather not buy another marathon if I can just shift the 4 year old to the booster. (the other twin is teeny and has trended that way, I don't expect her to outgrow the roundabout for a long time to come).
Any ideas from btdt moms?