This ball is made from zip ties (zap straps) and has a nice mathematical colouring.
You will need:
60 small zip ties (zap straps, plastic cable ties). Large zip ties are more difficult to hack for this project.
A push pin
Needle nose pliers
(optional) Tester's model paint
If you are math inclined, we are building an dodecahedron with a 5-colouring that shows its rotational symmetry group, A5. That is, all 60 even permutations of the 5 colours can be obtained by rotating the zip-tie ball about a pair of opposite faces (diamonds, triangles, or rounded pentagons). You can learn more here
, or read a rough description in the last step.
Many different shapes can be built with this method.