This is more suited to A level. These are resources to teach students about the tradition of el Día de los Santos Inocentes – a kind of April Fools Day – which takes place on December 28th. The worksheet explains the tradition and goes on to work on some grammar – compound tenses. The PowerPoint gives the answers.
The video explains how to play a joke on someone! It is from the great website www.practicopedia.com which can give you a video on almost any topic.