Although pumpkins are the default choice for making jack-o'-lanterns, they are not the only choice. Instead, one can use other gourds such as winter, butternut, or turban squashes. Alternatively, one can also use sweet potatoes, zucchinis, turnips, or potatoes to carve some smaller yet uniquely shaped scary faces.
Watermelons can make good substitutes for pumpkins. One can also make some really weird jack-o'-lantern designs with other fruits like avocados, apples, bananas, or pineapples. Since most of these fruits have soft flesh, carving them is a little more difficult as compared to vegetables.
Probably one of the easiest Halloween decorations to create, one can create spooky heads with just some balloons. All one has to do is draw designs onto the balloons with markers, put a glow stick inside, fill the balloons with helium, and tie them up with string. You may also drape sheer white cloth over the balloons so that they look like ghosts. A great piece of decoration.
Paper Bag Jack-O'-Lanterns
All one has to do is use a paper cutter to create designs on the paper bag, pour in a bowl of sand, and place a candle in it. The glow of the candle will display the cut patterns of the jack-o'-lanterns and other Halloween designs beautifully. This effect can be increased by sticking translucent tracing paper behind the cutout pattern.
Tin Can Jack-O'-Lanterns
While tin cans of any size will do for this purpose, larger cans will allow you to create more free-flowing designs of the jack-o'-lanterns. One simply has to take off the wrapper, and use a hammer and nails to create the facial features. This is followed by either painting it or covering it with colored paper. You can also experiment by using electrical lights instead of candles to create a robotic effect for the faces.