Answer:
You throw me out when you want to use me and you take me in when you don't want to use me. Who am I?
When Iām metal or wood, I help you get home. When Iām flesh and Iām blood, In the darkness I roam.
Be sure to shout for its answers are weak, but there is no language it cannot speak.
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around.
I am the tool, for inspiring many. Buy me in the store, for not much more than a penny. Don't overuse me, or my usefulness will go.
What has wheels and flies but is not an aircraft?