Dora the Explorer Wiki

This article is about the book. For the episode of the same name, go here.
OR, click here for the VHS/DVD that also has the same name.

Big Sister Dora! is the 13th book in the Dora the Explorer book series.


Someone new is going to join Dora's family! It’s someone who sleeps in a cradle, drinks from a bottle, wears diapers, and likes to be rocked to sleep. Can you guess what it might be? That's right! Dora's mamí is having a baby and Dora is eagerly awaiting the new arrival - she just can't wait to be a big sister. But when Dora arrives to see the new baby, there's a big surprise waiting for her - twins! Now Dora has a baby brother and a baby sister.


  • This book was released the same day as the premiere of Star Mountain.
  • The book was released a day less than a month before the episode premiered and exactly a month before the VHS/DVD was released.
  • There are several notable differences between the book and episode:
    • Backpack's segment has been withdrawn from the book.
      • Additionally, the scene that follows, the one where Dora gets a call from Papi, has also been withdrawn from the book.
    • In the book, Dora, Boots, and Isa only took one path through the Spooky Forest; in the episode, they took two.
    • The scenario where Dora and Boots help Tico and his cousins through the Nut Farm has been withdrawn from the book.
    • Abuela is wearing her normal outfit in the book, but in the episode, she wears her party dress.
    • In the book, Perrito has red fur instead of brown.
    • Abuela does not give Dora and Boots their baby buttons, which do not appear until after Dora meets the twins.
    • The baby buttons are much larger in the book than they appeared in the actual episode.
    • In the book, the twins were already awake when Dora meets them; in the episode, they were asleep.
    • In the book, Mami says the babies are tired; in the episode, the babies yawn and Dora says that they are tired.