What you need:
Tons of paper towel and toilet paper rolls (sticky pieces of left behind paper removed)
Hot glue gun
Flatten the roll and cut into small strips. I just eyeballed and got about 8-9 strips from one roll.
Lay out the strips on a flat surface in a pattern of your choice. I used a flower shape for this version, but the other rolls I have saved are for a HUGE sunburst pattern that will take awhile to finish. Then you simply hot glue the strips together at the connecting points and use paper clips to keep them secure until they dry.
After you have enough individual flowers, lay them out in another pattern together and repeat the previous steps. Once it dries, find a wall to hang it on and marvel at your badass DIY skills.