Burning coals are certain to give your haunted house an eerie look and you can create them really easily. This is a great upcycle project. You use cardboard, two liter soda bottles, orange or red bulb lights and spray foam along with spray paint. It’s a really simple project but one that gives you a really intense aura. You can actually have this done in about an hour and if you have any recycling available, it will only cost you the spray paint and lights.