2x4s or similar
No more nails adhesive
Screwdriver (preferably electric)
An extra set of hands or clamps
Step 1: Cut the plywood
These beds are 1930mm (76") in diameter.
Cut eight pieces of plywood. I cut mine to 800mm x 300mm (about 31.5" x 11.8“). The size does not have to be exact as long as they are all the same. This picture shows wider pieces which made up the center bed of a mandala garden.