ONLINE EXTRAS SITE SERVICES  >  Wednesday, Jul 06, 2005           Posted on Sun, Jul. 03, 2005 An expiration date on a child car seat? What's going on here? BY ALINA TUGEND New York Times First it was the sunscreen. A friend told me you had to throw out your bottle or tube annually because the lotion expired after a year. I was skeptical, but it was a well-known rule, apparently. A while later, a mother with three young children told me she had to get rid of her car seat because she was told they expired after about five years. The expiration, she said, had something to do with the plastic disintegrating. It sounded to me like a ploy by manufacturers to persuade anxious parents to unnecessarily buy a new seat. But who wants to play with the lives of their children? A few weeks ago, Ford Motor Co. announced it was putting the first-ever ex

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