4 Homemade Halloween Costume Ideas From a Cardboard Box

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Marshmallow: Use double-sided carpet tape (available at hardware stores) to cover the box with white felt.

Chocolate squares: Cover two sheets of cardboard with brown felt, using double-sided carpet tape. (The cardboard sheets pictured here are each 20 inches square. You can cut them from an existing box or buy sheets at an office-supplies store.)

Graham crackers: Cut two more sheets of cardboard (these are each 22 inches square) and poke holes in them with scissors.

Smush it all together: Using double-sided carpet tape, attach the graham cracker pieces to the chocolate pieces, then tape the chocolate to the front.