This is a cookie cutter for making Space Invader alien dudes.

Created with this process:

Use this Processing app to edit or create your cookie cutter pattern: local-guru.net/blog/pages/cookiecutter-editor

If you want to use this particular model as an example, the source file is:
pacman-cookiecutter-source-file

This tool can export to .stl files.

Use a sugar cookie recipe, and decorate to your heart's content!

For this particular model, when printed to about 7cm across, we found the arms to be too small use for sugar cookies. Fortunately, we had the Pacman and Pacman Ghost already printed out, so we used them instead.