you can convert any of your images into a cartoon for free.
by using Dumpr-photo pencil sketch
Visit the Dumpr-photo pencil sketch website, you will see an option to browse and select the photo (you need to convert to cartoon or sketch) from your computer. Use the “Browse” option to select the photo and click on “Continue“.
It will be start displaying a message “uploading image“. When finished you will get a message “Done!! “. Your image is ready and is according to your requirement.
After you complete the process your converted picture will be shown to you.
source of information: http://www.baricblog.com or http://www.baricblog.com/2012/12/converter-any-picture-to-cartoon-or.html