No more diapers for me! That's what toddlers will proudly proclaim after they hear this appealing tale of a lovable duck who takes the big step. When Piggy can't come out to play because he's busy sitting on the potty, Ducky realizes it's time to grow up, too. A sweet and subtle story, with two huggable animals that children will embrace.     Bernette Ford is the author of the forthcoming First Snow , and co-author of Bright Eyes, Brown Skin . Sam Williams has illustrated numerous picture books for children, including Cold Little Duck, Duck, Duck by Lisa Westberg-Peters and Little Red by Sarah Ferguson, The Duchess of York.