Trick-or-Treat Bag This large bag would be ideal for a group of children to take on their trick-or-treat adventure this Halloween. Insert a piece of Halloween themed artwork into the plastic pocket! Materials Black Eco Bag SmallCartridge PaperCover Paper BlackArtline Liquid CrayonsMetallic Ripple Paper How to make a Trick-or-Treat Bag Step OneOn a sheet of Cartridge Paper, pencil out a design for Halloween. Step TwoColour the background with Liquid Crayons and collage the rest of the design with black Cover Paper and Metallic Ripple Paper. Step ThreeInsert the artwork into the pocket on the bag.