It's something you can do with liquid, usually water. Better go away if you have clothes on; You'll get them wet. Populated Water Parks and Beaches are full of people doing this. What is this thing?

I'm an indecisive gem. I can't decide on one color, So I have many of them. I'm most often seen as blue mixed with green, but highly desired is red-on-black mayhem. Despite not being the most talked-about stone, I'm one of the most visually interesting.

I come in many shapes and sizes, My appearance can give surprises. And you may find me in a line, While unattached from my vine. I now preform a task, That was given without ask. For this task I may cause a fright, But only on one night.

I ripple through space without leaving a trace, arriving unseen from place to place. You hear my passing though I’m never seen what am I moving in between?

A leafy barrier that whispers in the wind, guiding paths with verdant walls, standing guard with emerald arms.