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 Tamil H2H
by Ambed Anand
by Nicole North
by Bread08614
by Art and Sketch
by DIY CRAFTS VIDEOS
by Paper Zen - Cecelia Louie