My daughter is LOVING this! She loves to color and she loves pictures of
herself our family, so this is a great combo. This sketch is a photoshop technique, so sorry if you don’t have photoshop (I have heard picnik can do this). Should work on even the most basic photoshop version.
Pull up your image in photoshop, then go to Filter–Sketch–Photocopy and adjust the detail and darkness settings. Keep the detail setting as low as possible while keeping the outlines of the image. The detail here is at 8 and the darkness at 5. The darkness setting needs to be dark enough to see the outlines you want to keep.
Clean up image by adjusting the levels. Go to Layers–New Adjustment Layer–Levels and increase the shadow levels (first arrow) until you are happy with the darkness of the lines. Then decrease the highlight levels (second arrow) to clean up the white areas of the picture. Print it out in black and white and voila!