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I’m a big supporter of extended rear-facing. Charlie just turned 3 and he is still rear-facing. He is about 39 inches tall and weighs about 34 lbs.
The car seat we have for Charlie is the Graco My Ride 65. We have 2 of them, one for Mommy’s car (a Dodge Journey) and one for Daddy’s car (a Ford Focus). We love them because Charlie has plenty of room and padding, plus he has two cup holders (snacks, small toys, cup, etc). Our favorite thing about this car seat is that Charlie can rear-face until he is 40 lbs. When he reaches that point, we’ll flip him around to forward-facing, where this car seat can accommodate up to 65 lbs.
In 2011, the American Academy of Pediatrics put out a new policy statement that children should rear-face until 2 years of age.

1. They’ll Break Their Legs
Even if this were true, I’d much rather have broken legs than a broken neck or back. I’ve heard this saying many times: “Broken leg, cast it. Broken neck, casket”. The thing is though, it’s really not any more true for rear-facing kids than it is if they are forward facing. In 2007, Crash Test data found that the rate of lower extremity injuries in rear-facing children was 1 per 1000 children and the rates for forward facing kids are within similar ranges.