问一句，你们都买的什么 car seat?

玫玫就要1岁/20磅了，不用 infant car seat 了。
阳阳快40磅了，现在的 Britax Roundabout convertible 也要淘汰给玫玫了。
阳阳还有一个 Britax Frontier，可以到 85 磅的。

听说小孩子40磅就可以坐 booster seat，虽然安全不如 5-point harness 的。

准备买两个新的，发现可买的 car seat 花样太多了。

Infant Car Seats: For children up to age 1, from newborn – 30 lbs, and up to 32" tall
Convertible Car Seats: For children up to age 7, from 5 – 80 lbs, and up to 53" tall
Youth & Toddler Car Seats: For children ages 1 – 8, from 20 – 80 lbs, and 19" – 59" tall
Booster Car Seats: For children ages 4 -10, from 30 – 100 lbs, and up to 60" tall

听说 Sunshine Kids Radian 的椅子比较窄，可以一排放三个，或放两个再坐一人。不知有没有人用过。