#plastimorph

I created the bulk of the creature using EVA foam floormats, like the ones used in cosplay armors. Seeing as there was no pattern that I could follow, this was quite a tedious process of trial and error in order to get the rough pumpkin shape in this sturdy material.

Once the main body was made and equipped with nifty finger rings to control the mouth, I grabbed a piece of leftover fabric to figure out how big the tentacles should be and how many Jack should have. These were then remade in faux fur to give the monster a slightly more huggable appearance. After all, a monster isn’t always all slime and goop!

Then I grabbed a good pile of Plastimorph and heated it up, sculpting the 13 teeth to fit in the monsters mouth. These would restore some of Jack’s pride as a ferocious creature, filling his grin with sharp and pointy bits!

I coated the EVA foam body with a few layers of Plastidip and let it dry for a day, after which I painted it with acrylic paints. The teeth were coated with a plastic primer before I painted them, to make sure that the paint wouldn't fall off. Last but not least, I sealed everything with clear non-shiny varnish. 

The fabric tentacles were filled up with plush stuffing and a piece of metal wire to make it posable. Finally I glued the hard and soft body parts together, making sure that everything was neatly finished.