Split from: Chicco MyFit - worth the 5"?


Sarah B

Hi, I have a: 70lb 48” responsible seven year old in Diono Cambria
50lb 42” silly four year ild in Britax Allegiance
20lb long? 3 month ild in Chico Keyfit 30

I also have a couple Diono backless boosters for the spare vehicle.

I’m trying not to buy another car seat. Can I just bump everyone up? Or when the baby gets too long for the Chicco do I need another 5pt harness seat.
Thanks so much, love this site!


CPST and ketchup snob
Staff member
Hi! I moved your post to its own thread for you.

If your middle child is 4 and a silly goofball, they aren't ready for a booster seat. When a child moves to a booster they become responsible for their own safety. Most kids aren't ready for a booster for that reason until 5 1/2-7 years old.

I would pass the convertible down to the baby, keep the oldest in the Cambria, and buy a combination seat for the middle child with a high harness height and a 65 lb weight limit. (Chicco MyFit, Graco Nautilus, Britax Grow With You, Graco Tranzitions are a few examples at various price points. If you post info on your vehicle and budget we can make better recommendations.)

That way your child can stay harnessed until they have a bit more brain development under their belt, which will help them be mature enough to stay in place seated properly 100% of the time, every ride.


Thanks so much for the advice!
We're driving an '09 Sienna and we're mostly interested in ease/correct installation vs. budget. That said, I've never purchased a Peg Perego or Chicco seat because I couldn't stomach the price.

Sarah B

New member
Thanks, ketchupqueen, I've been reading your advice for years :)

We're driving an '09 Sienna and I'd say we're mid-range budget.


CPST and ketchup snob
Staff member
Britax Grow With You is certainly the easiest install, but the Graco Nautilus is very highly compatible in vehicles of that era, including yours, and while it won't be super super simple, it wouldn't be DIFFICULT either- a pretty straightforward and standard install at a low end of mid range price tag.

Sarah B

New member
Sounds good, except I can't source a Nautilus anywhere! I've thankfully got a bit of time before I need to bump up the baby.
Side note - The Britax Allegiance was a beast to install and the seat cover still isn't working!

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