string art project for my kid's geometry class. she needs a pattern and it has to contain circles?
the pattern has to be complex and fit on at least a 15 x 15 wood board.
must contain a circle, semicircle, or ellipse. has to be or appear to be difficult.
Hmm. I'm not totally sure what the project IS but I found some ideas:
http://www.ufopictures.info/Pictures/CropCircle-008.jpg
http://images.google.com/imgres?imgurl=http://2.bp.blogspot.com/_A-bXyPL07Ww/SY8ymPigHJI/AAAAAAAAC6o/KI939i0a49Q/s400/crop-circle-google-earth3.jpg&imgrefurl=http://bigbrotherearth.blogspot.com/2009/02/cool-crop-circles-seen-in-google-earth.html&usg=__unM1TtPZoo_YUxIlzdl5kUWxrK8=&h=315&w=400&sz=60&hl=en&start=36&um=1&tbnid=XajL1z2ZzCBmxM:&tbnh=98&tbnw=124&prev=/images%3Fq%3Dcool%2Bcircle%2Bdesigns%26ndsp%3D21%26hl%3Den%26rls%3Dcom.microsoft:en-us:IE-SearchBox%26rlz%3D1I7GWYE%26sa%3DN%26start%3D21%26um%3D1
http://images.google.com/imgres?imgurl=http://sacrednumber.squarespace.com/storage/crop-circle-metatron.jpg&imgrefurl=http://sacrednumber.squarespace.com/journal/2007/8/5/metatrons-cube-crop-circle-design-revised.html&usg=__LheqSpM1E-OytIsirsyyPDGl7pQ=&h=268&w=400&sz=157&hl=en&start=78&um=1&tbnid=qDh5x14wzSFD7M:&tbnh=83&tbnw=124&prev=/images%3Fq%3Dcool%2Bcircle%2Bdesigns%26ndsp%3D21%26hl%3Den%26rls%3Dcom.microsoft:en-us:IE-SearchBox%26rlz%3D1I7GWYE%26sa%3DN%26start%3D63%26um%3D1
http://www.needlenthread.com/Images/patterns/Hand_Embroidery/Circle_Design.gif
http://images.google.com/imgres?imgurl=http://www.lucypringle.co.uk/photos/2008/uk2008bc3.jpg&imgrefurl=http://www.lucypringle.co.uk/photos/2008/uk2008bc.shtml&usg=__3-ujgb4nU3E0mnRQ8Qeps_O1s-E=&h=800&w=744&sz=126&hl=en&start=25&um=1&tbnid=VbyqZp1V6hSJmM:&tbnh=143&tbnw=133&prev=/images%3Fq%3Dcircle%2Bdesigns%2Bcomplex%26ndsp%3D21%26hl%3Den%26rls%3Dcom.microsoft:en-us:IE-SearchBox%26rlz%3D1I7GWYE%26sa%3DN%26start%3D21%26um%3D1
http://www.math.tu-berlin.de/geometrie/ddg/images/CirclePattern.png
Good luck! 
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