Answer:
What is never used unless it's in a tight place?
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
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?
I'm tall in the morning and short in the noon. I disappear at night but I will be back soon.
My head bobs lazily in the sun. You think I'm cute. For my face is yellow my hair is white and my body is green.
If you can spot one of these eastern warriors, it means they're not doing their job right.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?