Answer:
Covered in stone and sun. It's home to many but also none. What is it?
I can travel from there to here by disappearing, and here to there by reappearing.
Four of us are in your field, But our differences keep us at yield, First, a one that is no fool, Though he resembles a gardenerโs tool, Next, one difficult to split in two, And a girl once had one as big as her shoe, Then, to the mind, oneโs a lovely bonder, And truancy makes it grow fonder, Last, a stem connecting dots of three
What can you put in a barrel to make it lighter?
When I'm born I fly. When I'm alive I lay. When I'm dead I run.
You use it between your head and your toes, the more it works the thinner it grows.