2 London taxi-style hubcaps, as found on the verge
1 tube of silicone
Assorted standard tools
Step 1: Cut down a tree
Essentially we're looking for a tall post that will prevent cat-pouncing, well anchored to the ground. Sounds like the first 10' of a birch tree... We had a suitable candidate, a beautiful tree, but sadly its root system was starting to destroy our pathway.