I think all of these activities sound innovative, and certainly sound fun, but outside of your original idea, I'm not sure any of them are particularly age appropriate. As a student (even a 1st year college student) I might have a hard time taking some of these ideas seriously unless there was an obvious point in the lesson to some aspect of the overall purpose of the class and higher learning. I think that even while you brainstorm innovative activities, you must keep in mind the goal or the objective(s) of this class.
When I was in college, it was particularly frustrating to me to be in classes which didn't seem to have an end goal in mind. I couldn't take these classes or the professors seriously, because each class felt unpredictable, disconnected, and pointless. No matter what you choose to do, if you've outlined the entire course and the direction you are taking your students is clear and purposeful, the activities won't matter as much.