Is it okay to use the infant seat from my first born for my second baby? It’s never been in an accident and it doesn’t expire for another 7 years. We’ve been storing it in the original box it came in and my son only used it for 6 months. We have to buy a new convertible car seat because my first born is still using his, but I’m just curious about the infant seat. We will buy a new one if that’s what y’all suggest, but I want to make sure it’s absolutely necessary first. Thanks!