Answer:
What is used to yell in a text?
It goes up and down the stairs without moving.
I am a piece of paper that takes most people 3 or 4 years to get. What am I?
I know a word of letters three, add two and less there will be.
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?