One thing that annoys me is that pumpkins have faces when you naturally find them. They should just be plain pumpkins. You should be able to carve them by right-clicking on them with a sword. It takes up a little durability on the sword, and each sword has a different face. A diamond sword would make a creeper dace or something :). An un-carved pumpkin is called a pumpkin, a carved one is called a jack-o-lantern (unlit), and a lit one (with a torch) is called a jack-o-lantern (lit).