A practical joke evice is a manufactured prop or toy intended to confuse, frighten, or amuse individuals as a prank. Often, these objects are harmless facsimiles of disgusting or terrifying objects, such as vomit or spilled nail polish. In other instances, they are created as seemingly-harmless items designed to humorously malfunction in such a way as to confuse or harm the target of a prank. The devices are frequently sold in magic or specialty shops, purchased over the Internet, or crafted for oneself. Perhaps the most notable such device is the Whoopee cushion.