After only Rutin did the baseball challenge, and the difficulty of coming up with ideas that will appeal to all, could it be an idea for us to use a crowd based system for deciding between challenge topics? How would it sound if either the organiser (or the group members) brainstormed a bunch of suggestions, and we used a poll to decide on the most popular choice? That way we could get as many as possible of us to have a go.
Thoughts?