Answer:
I run up and down the stairs without moving. What am I?
At night I come without being fetched, and by day I am lost without being stolen. What am I?
I start with an E end with an E and have a letter in me.
If I drink, I die. If I eat, I am fine. What am I?
I have memories, but none of my own. Whatever's on my inside is what is shown. If I'm ever different, it's because you changed me. I feel like a decoration, here for you to arrange me. What am I?
What language does a billboard speak?