Sculpting Sonic the Hedgehog with a 3D printing pen

This video is narrated in Korean and I didn't understand one word, but the artist's calm voice makes it all the more relaxing to watch Sonic the Hedgehog emerge from the tip of a 3D printing pen [YouTube]. The medium allows him to integrate electronics that would be all but impossible with clay. He appears to be using the MYNT3D Professional Printing 3D Pen [Amazon], which has a little display to monitor temperature.

I like it best when Sonic's at the "wicker man" stage, below. Is the material flammable? I have wasps.

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