I enjoy giving these as gifts, and several people have asked how I make them. I originally saw them on the Folding Trees website, and here is the tutorial for the kusudama balls. I use traditional origami or chiyogami papers, but, with some help from my daughter, I am in the process of making a ball from paper recycled from security envelopes (the kind your bank might use). I will post a picture when it is completed.
Thank you FT for your great tutorials and this photo.