The term 'ingenious devices' can refer to a variety of objects, from simple tools to complex machines. One example of an ingenious device is a 'GIMMICK, ' which is an object or device designed to be clever or amusing. Gimmicks are often used in marketing and advertising campaigns to draw attention to a product or service. They can also be used to solve problems or make tasks easier. Gimmicks can range from simple toys to complex machines, but they all have one thing in common: they are designed to be clever and inventive.