In order to complete an ice-breaker task learners must talk to each other.
Example
The teacher gives each learner a sheet with a series of 'Find someone who…' statements, e.g. 'Find someone who has a cat'. Learners circulate around the class and complete the statements with names.
In the classroom
Relationships between learners are fundamental to successful learning in many approaches and methodologies, and ice-breakers are designed to begin the process of building a positive dynamic in the class.
Further links:
https://www.teachingenglish.org.uk/article/secret-code-game
https://www.teachingenglish.org.uk/article/warmers
https://www.teachingenglish.org.uk/blogs/rachael-roberts/rachael-roberts-breaking-ice