This marvelous ball of flowers made from folded paper is called a Kusudama. I am not at all knowledgeable about it, but it is beautiful! It is relatively simple to make, though quite time consuming - that tends to be the way with origami! The tutorial I originally followed was on a site called Folding Trees, however this appears to have been replaced by a new site, PlanetJune. The basic petal/flower tutorial is still available here, but a donation is now required to view the full instructions. I suspect a Google about how to assemble an origami kusudama could help you find your way :)
I made this kusudama with half cream flowers and half gold flowers. because my gold paper was single sided, and thus had white edges, I applied gold ink to the centre folds for more colour and sparkle. I hung the kusudama using organza ribbon and some lovely complimentary beads from my stash. If you're wondering about adhesives, I used pritt stick to form the petals, double sided sticky tapes to form the flowers, and then my glue gun for final assembly. Despite it being a rather larger task than I anticipated, I already have another one in the works! Here it is on the Christmas tree:
