My daughter, Beth, continually finds interesting quilting and fiber art challenges to participate in.  You’ll see the latest on her Meandering Threads blog.  It’s called Take a Stitch Tuesday.
On Beth’s blog, you’ll see a photo of her first stitch results.  The challenge information is found on the Take a Stitch Turesay Challenge, Sharon Boggon’s blog. 
It’s fascinating what you can do, and what each fiber artist does (see the participants on Sharon’s blog) create with various stitches.