This woven tetrahedron is far easier to weave than the octahedron.
- Cut out the 2 identical pieces
- Score along the flap and along the imaginary lines connecting the valley bottom between the small triangles and the corners
- Cut away the small triangles from the sides of the strips
- Crease so that the forms swirl in opposite directions (#1)
- Place the two pieces so that the flaps end in the same point and the long sections of the flaps follow the crease
- Weave one long strip, line up carefully and fix with glue (#2)
- Weave the rest of the two faces while flat, line up and fix with glue as you go along (#3)
- Crease the form and weave the two remaining faces. Start by weaving the longer sections of the strips running along what you already have woven. Align and fix (#4)
- Then weave the rest of the strips, line up and fix as you go along (#5)
- Close the tetrahedron by gluing down the two open sides to the flaps.
And a vector-pdf for cutting the pieces: Tetrahedron cut