I wanted some cute art in the bathroom, and saw this blog post with a child's silhouette.
I took a cheap 9x12 inch canvas, painted it with off-white acrylic paint and traced my daughter's silhouettes with pencil.
To make their silhouettes, I took their pictures, pasted them into a Word document, and enlarged them to fill an 8-1/2 x 11 sheet of paper.
Then I printed them out in black and white and cut around the outline of their heads.
Then, I painted inside the traced lines with black acrylic paint, and voila! Pretty fun!