I had such success with the first grade Picasso's last year, that I did not change the project for this year.
We looked at a variety of portraits painted by Picasso and then drew our own. The students were allowed to choose if they wanted to use liquid watercolor, oil pastels or Crayola Color Sticks.
See last year's post for more info: 2012 Picasso Portraits
Here are examples of this year's finished products: