My favorite paper mache projects as a kid were always the ones involving balloons. We would layer strips of glue-soaked newspaper over the balloons and hang them up to dry. The next day was the magical moment when we got to pop the balloons leaving behind the empty newspaper shell. I think the balloon popping was my favorite part. The craft project that made use of that shell was just to fill time.
Also, I was recently interviewed on Tall Tale Radio. Check it out!