Answer:
I suck.
I come with a train and go with a train and the train doesn't need me but can't go without me.
I reach for the sky, but clutch to the ground. Sometimes I leave, but I am always around. What am I?
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
I am a mountain at night, meadow at day. What am I?
Keep doing me to avoid lens dryness
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic