Answer:
Fables are typically short.
Fables typically have animal characters.
Fables typically teach a lesson.
Explanation:
A fable is a short story, which uses characters that are usually animals to tell a story and through this story leave a teaching.
The characters in the fable can also be objects that are given human characteristics.
Children often like children very much because being so short and with such striking characters they are very well perceived by them, however the lessons they leave are applicable in most cases at any age.