Answer:
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?
Only two backbones and thousands of ribs.
What is it that makes tears without sorrow and takes its journey to heaven?
What is full of holes but still holds water
What surrounds the world, yet dwells within a thimble?
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?