The facilitator keeps time with a stopwatch and sets the first few themes before encouraging others from the group to come up with topics. People partner up and sit facing each other, deciding between them who will begin fast talking. A theme is set and a minute is given for each person to speak about the theme in a stream of consciousness kind of way, whatever comes to their mind. After one minute, the other person talks for 1 minute. New pairs can be formed throughout the game.
Variation: Word association
The participants sit in a circle. The facilitator introduces a theme/word. Going around the circle, each person responds individually with the first association (one word) that comes to mind. This is another good way to start a creative flow of thoughts in the group.