Answer:
I open wide and tight I shut, Sharp am I and paper-cut fingers too, so do take care, I'm good and bad, so best beware.
What has a spot and is very bright, is sometimes, red, white, blue, yellow or green and is often blinding.
What has six faces and twenty-one eyes?
What can't you see, hear or feel, until its too late. What shadows love, and shopkeepers hate?
Large as a mountain, small as a pea, Endlessly swimming in a water-less sea.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.