What Am I Riddles

Question: Only one color, but not one size, Stuck at the bottom, yet easily flies, Present in sun, but not in rain, Doing no harm, and feeling no pain. What am I?

Question: Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not.

What is it?

Question: What gets longer when pulled,fits between breasts, slides neatly into a hole,has choked people when used improperly,and works best when jerked?

Question: I'm tall when I'm young and I'm short when I'm old.What am I?

Question: Countless blades that bend with a touch,
exploited by kids who want to make a buck.

What am I?