When Grover runs into Marsha and her baby brother, Grover dreams about how fun it would be to take care of his baby cousin, Emily. He would let her play with his toys, introduce her to all his friends, and take her for walks. He would sing her lullabies and even let her borrow his teddy bear. When he gets home, he finds out that his Aunt and Uncle are bringing baby Emily over, and he’ll be able to take care of her for real!