What you need:
For Ghosts -
Paper (preferably white)
Glue
Cotton balls
Scissors
Black
paint/marker (optional for eyes and mouth)
For banner -
Craft paper
Orange paint
How to make ghost:
Free hand the shape of a ghost and cut.
Cover with a thin line of glue and fill in the shape with stretched cotton balls.
This is a good job for your littlest helpers.
Using black paint and scrap paper, draw a face for your ghost. Glue it on the cotton ball ghost.
For banner-
Cut some craft paper into triangles, squares or banner shape and paint the letters b-o-o in orange paint.
Hang and enjoy!