3. DIY your costume Handy with a thread and needle or a set of power tools? Show off your DIY skills – and conserve resources – by making your own Halloween costume this year. Instructables.com’s special Halloween section features a wide range of costume ideas and instructions, including a simple sewing pattern for a Smurfette costume and detailed directions for zombie make-up. Or dig through your recycling bin to create a one-of-a-kind kids’ robot costume. All you need is cardboard boxes, an old CD, yogurt lids, plastic bottles and these simple directions from TerraCycle.