Paint all toilet paper rolls black and let them dry. These will form your castle towers. For a fun look, you can vary their heights by trimming a few shorter.
Cut out cone shapes from egg cartons or paper, paint them bright yellow or orange, and glue them on top of the rolls to make spooky roofs.
Paint or cut out small windows using green or yellow paper and glue them on each tower. Then add a door to one of the rolls to serve as the castle entrance.
Use black paper to craft spiders and white paper for ghosts, drawing their faces with a marker. Glue or tape them around the castle walls.
Decorate the base with mini pumpkins and creepy crawlies. Once finished, you’ll have a haunted cardboard castle that looks straight out of a Halloween fairy tale!