Answer:
What I am filled, I can point the way. When I am empty. Nothing moves me. I have two skins. One without and one within.
What runs around all day. Then lies under the bed. With its tongue hanging out?
What is it that was given to you, belongs only to you. And yet your friends use it more than you do?
It's like food but water kills it. What is it?
It is able to speak because it has a hard gone. You know what it is as soon as it has sung. What is it?
People take me on walks and I run and have fun. What am I?