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Here is a miniature of a two headed snake, printable in Ultra Frosted Detail. It is suitable for RPG board games and is around 8 cm tall.
Update: So after a year or so, shapeways must have changed some of the algorithms and now the snake model is now unprintable (no idea why since I printed it out once alread). I had to make some adjustments to make the model printable such as removing the jagged teeth and making the model slightly larger to thicken fangs.
I have also removed the tongue, as it would not pass the checks for printabilty.