To create a spooky ghost to add to a Halloween-inspired terrarium, tear a tissue in half and layer the pieces to form a cross, then place a 1&amp;quot; foam ball in the center. Gather the tissue around the foam ball and use fishing line to create the ghost&apos;s neck by tying a knot around the base of the foam ball. Cut out two black tag board ovals to act as eyes and attach them with glue. Shorten the prongs of a U-shaped floral pin with wire snips, and then push it into the top of the ghost&apos;s head. Knot one end of a piece of fishing line around the floral pin and attach the other end to the underside of the jar&apos;s lid with clear tape.