This document discusses Nina Simon's views on participatory museum design based on her experiences. It shares three lessons she learned: 1) More scaffolding and constraints lead to better participation. For example, providing specific prompts for posters at Denver Art Museum increased engagement. 2) Different prompts and input mechanisms elicit different contributions from users. 3) Responsiveness is the most important factor, as feedback encourages continued participation. The document asks how users can help improve various projects and institutions.