Egg cartons are one of my favourite and readily accessible carbon-rich ‘browns’. They help to soak up moisture from ‘green’ kitchen cuttings. Smaller pieces incorporate better and don’t matt. Involve your children in your composting by getting them to tear egg cartons into little pieces and add regularly to your YOLO Compost Tumbler. If your compost is too wet and a bit smelly, get the balance correct by adding dry, absorbent ‘brown’ materials like egg cartons.