There are a lot of items you may discard that can fulfill a second purpose around your house. Those coffee grounds, potato peelings, brown bananas and rotten peas are black gold as compost for your garden. Ironically, food you normally might throw away can be converted into fertilizer to feed a whole new generation of crops. You can purchase compost bins or make your own for little or no money. Not only that, you can make a small worm compost bin indoors and use it teach your kids that the cycle of life really is amazing.