The supply list for a duct tape topiary is pretty small...
Styrofoam ball...(go with a small size, trust me:)
a wooden dowel
2 rolls of black duct tape
glass or a pot
The black rosettes are made by cutting 6''-8'' of duct tape, folding the edge down and rolling.
You can check out a more detailed tutorial with THIS project.
Once you have a few million (j/k but it feels like it) rosettes, glue them to the styrofoam ball.
Keep them nice and close to each other. It takes a lot. I used 2 full rolls of duct tape.
Shove a painted dowel into the center of the ball and plant it in a pot full of candy corn.
I probably should have used something a little less edible. I'm sure this won't make it until Halloween...or Sunday for that matter.