Answer:
What goes inside boots and outside shoes?
What you become during a workout?
Cold head and feet; Round as a ball; Always turning around itself.
They come out at night without being called, and are lost in the day without being stolen. What are they?
You are on an electric train. Which direction will the smoke fly in?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?