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 Origami How To
by Melissa Laverty
by YES Spaces with Barbara Miller
by Dishin With Di
by Unhinged Productions