The interlocking triangular geometry distributes weight evenly, making geodesic domes incredibly strong for supporting multiple jumping cats despite using lightweight single-wall cardboard. Leaving the top apex open provides an elevated lookout perch. The color palette showcases raw kraft cardboard, black geometric edge tape, and metallic accents.

       +-------------------------------------------------+
       |           GEODESIC DOME CAT FORTRESS            |
       |                                                 |
       |                     /\                          |
       |                    /  \   <-- Top Apex Perch    |
       |                   /----\                        |
       |                  /\    /\                       |
       |                 /  \  /  \                      |
       |                /----\-----\                     |
       |               /\    /\    /\                    |
       |              /  \  /  \  /  \                   |
       |             /----\----/----\                    |
       |            [ Circular Entry Arch ]              |
       +-------------------------------------------------+

Step-by-Step DIY Assembly

  1. Cut Triangular Panels: Cut 30 isosceles and 20 equilateral cardboard triangles with 1.5-inch outer folding flange tabs using a precise template.
  2. Fold Connecting Flanges: Score and fold the flange tabs outward at precise angles.
  3. Fasten Triangles: Join adjacent triangle tabs together using non-toxic glue and heavy-duty paper fasteners (brads) or hot glue.
  4. Form Entry & Apex: Omit 3 bottom triangles to create an entry arch; leave the top 5 triangles open for a top lookout hatch.
  5. Line Interior Base: Insert a soft round washable cat bed inside the dome base.