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 Joan Laws
by lylly drawing
by Mica's Paper Craft Channels
by Kaylee B
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by gx paul
by DIY-Accessories/Crafts