This article concerns the analysis of a brainstorming session, employing conversation analysis. This brainstorm session is intended as an activity in the process of designing a computergame for children. The session is led by a facilitator, who isinstructed by the maker of a prototype of a product (NOOT).The product NOOT is designed to support the interactive development of ideas for products, and it is to some extent used in the brainstorming activity. The brainstorm results in an arrangement of post-it notes on a whiteboard. The analysis discusses different methods for dealing with the task of ensuring that relevant issues end up on the
whiteboard and irrelevant ones don’t. Implications for the employment of NOOT in such sessions are then discussed