To ensure the crates don't fall on a trick-or-treater, use a cordless drill to attach each box with single screws. Leave the screws slightly loose, so you can twist or juxtapose the crates. Then place on your front porch, in your yard or entryway for a colorful and eye-catching way to display your bounty.
If you choose to display carved pumpkins on these makeshift shelves, use battery-operated flameless tealights in place of actual candles. Did you know that jack-o'-lanterns have traditionally been displayed on porches, steps and other outside areas of a home to protect it and ward off evil spirits?