Find a cardboard barrel you can slip your body into. If both ends are sealed or covered, use the utility knife to cut out a hole for your head in one end and completely cut off any covering on the other end for your legs to fit through. Paint the cardboard to resemble a can of Raid bug spray.
From Sherri - Why not take this costume one step further by making a small tube using construction paper and cellophane or masking tape. Also, if you can't get your hands on a large cardboard tube, fashion your own using heavy poster board.
Looking for more costume ideas and Halloween projects? Check out these easy costume ideas! You can also browse through my other Halloween articles and find many Halloween crafts, games, recipes, and other activities.