Taking a child's plasticine sculpture and immortalizing it with full color 3D printing would have been near impossible as a domestic project prior to the release of 123D Catch. 123D Catch is part of Autodesk's 123D range of 3D applications. This one allows you to take multiple photographs of a 3D object which it then converts into a 3D model capable of being edited and eventually 3D printed, just like Nothy pictured below.
To see exactly how Adam aka thecommonpeople flexed his 3D printing fatherhood muscle using 123D Catch and Shapeways check out the video below...
I did a similar thing and talked about it in this blog post. I would suggest making it hollow so you can make it bigger. I used Blender to do that.
If that link doesn't work the title of the post was "123d Catch scanning software printed result"