Big Baby is Lucien and Wayne's cousin. She only appeared in the episode of the same name when she comes to stay with the Cramps.
Personality[]
She doesn't seem to be able to communicate. The only things she says are "Pony! Pony!" and "I like pony!" When the parents aren't around, she jumps on Wayne and Lucien's backs and yells, "Pony! Pony!" It is clear from the episode that the twins don’t really have a good relationship with their cousin and are often annoyed and terrorised by her.
Even though she is five years old, Dorothy thinks she's sweet and adorable, just like a real baby until she causes trouble which Dorothy then decides to take her home.