Cut the pumpkin shape out of your EVA foam. I just freehanded this. If you have a projector, you could project one of the images from the movie onto a wall and trace it.
Lightly sketch the face onto the foam.
Use the back of your paint brush, or the back of a pen, to “carve” grooves into the foam to give it the appearance of a tree’s texture, like it has in the movie.
Paint the pumpkin! I combined a few oranges, and made one part of it lighter to mirror the lighting in the movie. I used a dark brown color for the face shapes. Paint the stem a deep forest green.
For the nose, cut out three triangles. Hot glue them together, one on top of the other. Paint the stack a beige color. Let dry.
Hot glue the nose onto the pumpkin.
Use nails (or another method, depending on where you’re hanging it) to hang!