Here is a tutorial on how to change your photos into coloring pages using Picasa (because it’s a free program available to virtually everyone!)
Take a photo that is cropped how you want it and:
1. Select B&W to make your photo Black and White. You may want to finely tune your light and color settings to make the picture's white whiter and black blacker. I adjust Fill Light first, then Shadows, and then Highlights and work them until they look appropriate.
6. Save the picture and print and color!