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Helmet, chest plate, leggings, and boots.
You cannot craft it. Sorry.
Place 8 wooden planks of any color in a square formation in a crafting table, leaving the middle center space empty.
As described by the eHow article, wooden chests can be made via the following steps: collect four wooden blocks by felling trees; place the wood in the crafting table to make wooden planks; and place the wooden planks in a hollow square in the crafting table. The chest will then be crafted. For more information, see the eHow article or watch the tutorial video on Youtube.
The crafting grid recipe to make a chest plate (breast plate) in Minecraft is: x - x x x x x x x Where "-" is a blank space and "x" is the material that you are using (leather, iron, gold, diamond, or fire (which will create chainmail armour; you need an inventory editor for that, of course!).)