My world compost bin can not put kelp is kelp is edible items. World composting box use is to place various creatures, composting box to hold water, composting barrels have penetration to do traps, Java version can not penetrate the items, Java box can be placed in the apple. To consume kelp, you need to select it in the item bar and hold down the use button. Each dried kelp consumed restores 1 hunger point and 0.6 saturation points. Players consume dried kelp faster than most other foods in the game.