Answer:
I go up and down at the same time. Up towards to sky and down towards the ground. What am I?
Feed me and I live. Give me water and I die. What am I?
I go in dry and come out wet. The longer I stay in the stronger my surroundings get.
What has 13 hearts but no other organs?
What can fill a room but takes up no space?
What language does a billboard speak?