Colors and Symmetry in Skeletal Octahedra

Next week I'm conducting an origami math workshop for Grade 8 students, and one of the activities will be to fold a skeletal octahedron (really simple modular origami). The students will be asked to choose between five octahedra I already folded in various colors, to see what kind of color schemes and arrangements appeal to them.  We can then discuss about symmetry, graph coloring and more.

It would also be interesting to see which color schemes people like, even before the workshop, so here goes!

Color Schemes 1—5 (from left)