Giggle, Giggle, Quack is a children's book by Doreen Cronin, illustrated by Betsy Lewin and a sequel/spin-off to Click, Clack, Moo: Cows That Type. Published by Simon and Schuster, it tells the story of Farmer Brown's younger brother Bob, who is farm-sitting for the vacationing Farmer Brown. Farmer Brown leaves a to-do list for Bob, but Duck is able to get hold of it and write his own list. In 2004, a video based on the book won the Carnegie Medal for Excellence in Children's Video. Source: Wikipedia (en)