Create a prototype of your conference idea. How will you present this prototype in the final gallery walk? You might draw up a sample schedule, or create a skit to represent a new type of conference learning opportunity, or create a marketing website or paper pamphlet to promote the key new features of your conference.
Claim one of the blank prototype pages by going to the "Pages" tab on the right side menu and changing one of the titles from "Conference #" to your prototype's title. Add the elements of your prototype to that page.