orange, 2 is b and yellow, 3 is c and royal blue, 4 is d and green, 5 is e and light sky blue, 6 is f and pink, 7 is g and teal, and 8 is h and red. they all fit inside each other from a-1 on the inside to h-8 being the largest, and they also can be turned over and stacked with a-1 being the top of the tower and h-8 being the bottom. the duck also can fit comfortably on the top of either the stack or pyramid.
ariel loves to stack them, pyramid them, hide things under them, organize them by color, number, letter and 