Original air date: 3/21/2005 (produced in 2003)
Dora has some big news about her family: someone new is joining! It's someone who sleeps in a cradle, drinks from a bottle, and likes to be rocked to sleep. The answer is a baby, which means that Dora's Mamí is pregnant! However, Dora and Boots want to know the new baby's gender is (boy, girl, or twins), so they must rush to her house to see the new baby and find out.
Tropes:
- Cool Big Sis: Dora is now a sister to her newborn twins.
- Continuity Nod: The first location visited is the Spooky Forest from "Pablo's Flute".
- Early-Bird Cameo: This episode introduces Diego's sister Alicia, who will become his cohost in the spinoff, Go, Diego, Go!.
- New Baby Episode: This episode introduces Dora's twin siblings.
- Race Against the Clock: Dora has to hurry home so she can see her twins.
- Unto Us a Son and Daughter Are Born: This episode is about Dora hurrying home, as her mother is about to give birth. Dora becomes a big sister to a boy and girl who are known simply as "the twins."
- The Voiceless: Alicia debuts this episode but she doesn't speak at all.
