What a good car seat for a 3 ye old that’s not to big and heavy
We have the Britax click tight in all of our vehicles and both sets of grandparents have the same in theirs. We all LOVE that carseat! It's not a pain to get him in and out of, it wasn't ever a hassle if we had to move it to another vehicle, it's nice and sturdy and has AMAZING safety stats, testing and even tons of research/data material you can read up on.
We like the Chicco NextFit.