Not much time for a detailed explanation but I saw this idea on zamoranoarts.blogspot.com and thought it was an interesting idea on radial design. There are great step by step instructions on the site. I just love how they turned out. After the first day of classes only 3/4 of the students were finished but they were so excited that many took them home to finish and we will add to the wall as they come in.
This is a great lesson on Picasso and making mistakes/ from Beautiful Oops. The third grade students are encouraged to explore and attempt different eye, nose, mouth and ear shapes before selecting the one(s) that they choose to use on their artwork.
I'm a huge fan of craypas, except when they end up on the floor.