Clustering is brainstorming on paper. It helps students create non-linear thought webs, exploring ideas in a branching way.
Show students how to use the technique: Write a subject in the middle of the board and circle it (e.g., favorite games). Then take student suggestions about the subject and connect them in a web around the subject.
Afterward, let students try the technique. Tell them to write a favorite activity or animal in the middle of a piece of paper and circle it. Then have them write ideas connected to the central thought and connect them as well. Encourage them to keep clustering, making the ideas spread as far and wide as they can.
The very act of clustering can inspire students to think creatively about any topic, discovering possibilities.