Mimicking animal sounds

Aricis tries to mimick animal sounds, she can do cat and dog well. But she needs prompting for other animals like lion, elephant, snake, horse.

Then KZ said "Aricia, you show mummy ghost" Prior to that, she was mimicking elephant which does sound like ghost to me. But I'm wondering why is she asking my daughter to mimick a ghost....
"quick Aricia, show mummy ghost. Baa.........baa........."
Ai yoh! goat become ghost!!