"What a big tummy you have, Mommy," says Sarah.
"Have I eaten too much candy?" Mommy asks.
"No " Sarah laughs. "There's a baby in your tummy "
Sarah puts her little hands on Mommy's big tummy.
"Hello, baby " she calls. "I'm your big sister Sarah."
Sarah's so excited Mommy's having a baby and Sarah's going to be a big sister. She'll help change the baby's diaper and give the baby a bath. When the baby comes, Sarah celebrates...