This is a quick no-prep activity that can be used as an ice breaker or a regular activity.
Students usually like to talk about themselves and maybe boast a little so this activity is quite popular.
At the beginning of the lesson, ask them to pull out their mobile phones and tell them to browse their image gallery for a picture they wouldn’t mind showing to their classmates. It should be a photo taken by them and it can be anything as long as it is appropriate.
When they are ready, put them in pairs or groups of four and tell them they will be describing their classmate’s photos and deducing as much information they can from the pictures. At the end, the student who took the photo will explain the photo to their classmates.
Other picture based activities:
https://eflideas.com/2018/02/02/picture-based-speaking-activity/
https://eflideas.com/2017/10/22/speaking-resources-for-eslefl-teachers-picture-prompts/