I have been having some wonderful adventures with 3D printing in my classroom. One of our favorite activities is to draw something and 3D print it. You can use this for any image. It is quite simple even though you need to convert the file a few times. Here are are the instructions for creating a 3D print from any image.
Download the PDF here: 3D Print From Any Image
Enjoy!
Websites Used:
Online Convert
http://www.online-convert.com/
TinkerCAD