The troll dolls. I remember being practically mesmerized by the troll commercials when they'd come on during Saturday morning cartoons. My mother, who is a very VERY devout catholic, thought the dolls looked demonic so there was no way I was ever getting one.
I played dirty though. My aunt and I went shopping one time and caught me staring at the troll display. So she bought me one :D After I saw the Olsen twins on Full House, my doll never seemed more lifelike.