I'm creating a game inside of a game called "ROBLOX". The game gives you some scripting tools to allow me to basically create anything I want. The world is created up by decently large blocks. There are few exceptions to this (such as ramps, spheres, tubes, etc.)
I want to create a subtle hint of wind. It will be affecting the game play a little bit and I want the wind to be predictable. I first thought of creating a flag, but, a flag isn't very well made in such a game as ROBLOX.
So my question is, what different kinds of way can I imply that there is wind? What other methods will provide me with a natural representation of wind (I don’t want to put a meter or something, I want them to have to find it/figure it out for themselves).