Use your utility knife to cut out menacing eyes and a jagged mouth from each cardboard tube. Vary the shapes to give each tree its own creepy expression.
Attach the tube vertically to the cardboard base using hot glue. Then cut pool noodles in half lengthwise and glue them around the base as twisted roots.
Spray foam all over the surface of the tube, including around the roots. Focus on creating uneven, bark-like textures. Allow it to dry fully (about 8-12 hours).
Once dry, spray the entire structure black first, then mist over with dark brown to highlight the bark effect. You can lightly dust some gray paint for aged texture.
Place LED lights inside or behind the eyes to make them glow at night for an extra-spooky effect.
