Here is an EASY one, the Spike Ball or Spiky Cuboctahedron. If you can fold the classic origami pinwheel, this one should not give you problems at all. You can make it in various sizes, the smallest is shown here, but check out this site ...
by Smart Beast
by Dian Crafts
by Tuteate
by Osaka Crafts
by TyingItAllTogether
by Mr. Sanjit Saha
by 365SKETCHES