let's see
~turning 20
~patchwork (a bunch of blocks all the same size, scrappy or otherwise)
~pinwheels, though sometimes the center is a little hard
~rail fence (my avatar, quite easy and if they don't match up perfectly, you can't really tell, trust me!)
~around the world
~chineese coins,
http://www.ohfransson.com/.a/6a00e54...f5bd970c-500wi (not mine)