Set against the dull, poster-muffled shop fronts around them, Fred and George's windows hit the eye like a firework display. Casual passers-by were looking back over their shoulders at the windows, and a few rather stunned-looking people had actually come to a halt, transfixed. The left-hand window was dazzlingly full of an assortment of goods that revolved, popped, flashed, bounced and shrieked; Harry's eyes began to water just looking at it.