This instructable details how I did this.
The tools I used were a leatherman, a jigsaw and a drill, (and a ruler and marker), and a hot glue gun.
You will need....
-Black wrap (black foil)
-Black Tack (black foil tape)
-25mm PVC pipe - about a meter
-silk flowers - 6 of
-plastic vase/urn thingy.
-1mm garden wire
-6 sprinkler head tubes (or other thin rigid but bendy tube)
-spray paint in brown, black and dark green.