Some of you may have seen this when I posted it on Xanga a few years ago.
According to the instructions, kusudama means medicine ball.
The petals are made separately and then glued together. Folding the petals is rather simple. The hardest part was gluing the petals together, especially when it came to the third and fourth ones.
My smallest one. It measures about 6mm at the widest points and 2mm at the narrowest part.
When I folded my first one (not pictured) out of 0.5″ by 0.5″ squares, I noticed that it ended up pretty large (for something intended to be tiny), so I made a second one out of 9mm by 9mm squares. I felt like it could be even smaller, so on my third try, I used 0.25″ by 0.25″ squares for each petal. It might be possible to make an even smaller one, but it would have to be made from thinner paper, since the folds were already rather thick.
These were made from a strawberry Starburst wrapper. The hardest part was cutting the squares, since they had to be almost perfect. At that size, fractions of a millimeter matter.
I used a toothpick to open up some folds when making the smallest one. Aside from that, my fingernails did all the folding.