Playing dress-up is a normal part of growing up for little girls, and has been for a very long time. But, A lot of very sexual products are being marketed to very young kids, said Gigi Durham, a professor at the University of Iowa, discussing how she became quite disturbed last Halloween when a 5-year-old girl came knocking on her door wearing a gauzy miniskirt, tube top and platform shoes while carrying the Bratz doll that had inspired her racy outfit. M. Gigi Durham, who heads the Iowa Center