Cute as a Button

The boy sees his mom's belly getting bigger every day and dad tells him that, there is a younger sister/brother inside. Soon, mom goes to a hospital and gives birth to a younger sister. Dad tells him that the baby is as cute as a button but he doesn't understand and keeps thinking about it. Later, he searches everywhere for buttons, but finds they are not cute at all. When dad and mom come back with the baby, he looks at her round face, big eyes and sweet dimples, and suddenly realizes that his sister is really as cute as a button.