Entertaiment is a state of euphoria that makes you forget all your troubles and wish that it would last forever. It is a powerful force that can bring joy and stimulate learning, but it can also have negative effects if not properly regulated. Familiar forms of entertainment often cross over different media, demonstrating an almost unlimited potential for creative remix and ensuring the longevity and popularity of many familiar images and structures. [1] This article was originally published in Issue 57 of the Cambridge Dictionary.