I have no preferences on the colors for the buttons. I trust your judgment.
As far as the charity, it doesn't matter to me...as long as we check them out and make sure our stuff is going to go where it needs to be.
I would like to know what places you pick so I can check them out for myself and make sure I'm familiar with all of the particulars...yarn requirements, size, etc.
Thanks so much for your enthusiasm, my friend.