Well, here is the flower ball.
And here is the tutorial on how to make it. It is quite simple, but you must start out with perfectly square pieces of lightweight paper (20-24lb recommended. Printer paper usually is 20lb weight, to give you an idea.). Medium weight card stock will be too hard to fold. I hope you like folding paper, because you'll be doing a LOT of it!
As for glue, I used Aleene's Fast Grab Tacky Glue which is cheap and readily available in different sizes at craft stores. It grabs hold quickly so you don't sit there twirling your thumb...
How to make a Kusudama Origami Flower Ball
1. Cut a true square piece of paper. For the flower ball you will need to cut 60 pieces total. My ball was made with 3.5" square paper, but you can make it larger or even smaller if you wish. .
2. Fold point up to form a triangle.
3. Fold outer points in to meet center
5. Open the folds and form a pocket, then, staying in the fold lines, fold down. That is called an inverted fold. See next picture to see what it looks like.
11. Apply glue on inner edge as shown.
12. Glue the two edge pieces together and hold until set.
13. Make the next pedal and glue into place as shown.
You need 12 sections for the flower ball. Take a look at the picture: They are glued together at the point lines and form a nice ball as you go. If you keep the tips nicely together you will have no trouble finishing a tidy ball.