Not sure how many of these I'll ultimately end up completing, but they're definitely fun to do.
Boquet of fake flowers, preferably gerbers, preferably at least two layers of petals
Plastic eyeballs (dollar store's finest)
First I pulled off all the flowers and laid them out. These were some old and dusty ones that had spent much of their life buried in a garage, so they needed some dusting off. Fired up the glue gun, and started by doing a large dollop of glue onto the center of the gerber, then firmly placing the eyeball in the center. I did this with all of them and let them stand to firm up a bit. Now, I could have left them at this stage--they looked appropriately creepy. But because there were two layers of petals, I continued and did a line of glue around the middle of the eyeball, and taking a pencil, rolled up the petals. The first layer stuck, and the second layer fell back. After they had all cooled, I placed the flower heads back onto the stems.