Answer:
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has handsΝΎ lacks a head but has a face.
Three little letters, a paradox to some. The worse that it is, the better it becomes.
No matter how little or how much you use me, you change me every month.
Only two backbones and thousands of ribs.
What has two spines and a lot of ribs, and carries much but never moves?
What do angels sing in the shower?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?