Life does start to seem like a never-ending marathon with kids (and I just have one, a newbie who sleeps a lot!), so this high-end car seat is well-named. A workhorse, the Britax Marathon ($214.43 on Amazon) fits children five- to 35-pounds rear-facing and 1-year-old and up from 20 to 65 pounds forward-facing. Most parents I know get this for their older toddler and love the comfort it gives larger children. And if you like your car seat with a splash of pattern, you can get it in cowmooflage.