If you've been a parent for more than six months, you probably have baby gear stashed in the top of your closet or attic or storage or, well, you get the idea. For some of us, it stays there until another baby needs it, or until it's time for a spring clean, neighborhood yard sale, or donation run. Many of us save car seats for years, "just in case," but can you return an expired car seatwhen you don't need it anymore?