Answer:
I am an English word that is as long as I am valued.
I hide but my head is outside. What am I?
You can see me in water, but I never get wet. What am I?
I am black within and red without With four corners round about.
I am all around, yet to me you are half blind. Sunlight makes me invisible and difficult to find. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.