Here are the things you will need:
- 9′ & 5′ pvc pipe >> for trunks & ships
- 2′ x 3′ plywood board >> for base
- 15″ & 18″ pine round panels >> for saucers
- 1′ x 3′ plywood board >> for Bird of Prey wings
- 8 round caps >> for nacelle tips
- 4 flat caps >> for attaching the pipe trunks to the ships, and trunks to the base
- 3 T-connectors >> for the Enterprise
- 1 X-connector >> for the Enterprise
- 2 elbow connectors >> for the Enterprise
- 2 straight connectors >> for connecting the pipe trunks to the flat caps
- 15 2″ length bolts (5/16″ or 1/4″) >> these are for attaching pipes to wooden boards
- 3 (2 1/2″ length bolts) >> needs to go through both wooden parts of the Bird of Prey
- 18 nuts (same diameter as bolts)
- carpet (I recommend getting “remnant carpet” which is ~50% off. We got 12’x4′ and had plenty left over)
- 250 ft sisal rope (1/4″ diameter)
- pipe adhesive (smallest container available)
- 10″ L-brace
- 8″ L-brace
- 1/4″ screws (2-2 1/2″ long)
- utility knife (to cut the carpet)
- handsaw (get a small one with a wooden handle that can cut pipe & wood)
- staple gun (5/16″ minimum length staples)
- drill (to drill holes for bolts & put bolts in)
- ratchet wrench (to secure nuts)
- scissors (to trim the carpet)
Source: http://www.instructables.com/id/Star-Trek-Cat-Tree-with-Enterprise-and-Romulan-Bi/?ALLSTEPS