Annual rings in trees often represent a tree's growth each year, and can often give clues to the enviromental conditions over the years. Fractals, in the most basic sense, can be thought of as a shape made up of smaller copies of the same shape (ie a triangle made of of other triangles), and these fractals can be found in every day life, espeically in nature.
So this time we have two different challenges to vote for! We have entries for the annual ring challenge from:
inalather

http://www.etsy.com/view_listing.php?listing_id=30412862
janssendesigns

http://www.etsy.com/view_listing.php?listing_id=29300253
pandphomemades

http://www.etsy.com/view_listing.php?listing_id=30156899
And our Fractal Geometry entries from:
pandphomemades

http://www.etsy.com/view_listing.php?listing_id=23472064
minouette


http://www.etsy.com/view_listing.php?listing_id=31531306
http://www.etsy.com/view_listing.php?listing_id=31698594
Polymath

http://www.etsy.com/view_listing.php?listing_id=29126209
And be sure to check out our Etsy treasury, which will be up until Wednesday (Oct 7), featuring these and other great team items!
http://www.etsy.com/treasury_list.php?room_id=85856