The last thing that Cassandra Higgins expects out of her Sunday is to be mesmerized at a collectors' convention by a snowglobe. She's enjoying some mommy time, with husband Ken at home tending their brood of four young boys, when she's utterly charmed by the one-of-a kind globe containing figures of three dogs and a little girl with hair the color of her own. She can't resist taking the unique globe home--even if means wrestling another shopper for...