Last year I developed a low-tech way to demonstrate commenting and tagging during a follow-up class on Learning 2.0. We found some funny pictures, taped them to a few flip charts, and gave everyone in the class some post it notes to write down their comments and labels for the pictures. On one of the flip charts we left the post it notes up for everyone to see (Web 2.0). On another flip chart we removed the post it notes as soon as they were posted (Web 1.0).It was fun and useful in a few ways. It was an easy way to get the concept across to the learners. It also gave everyone a chance to get up and move around–which is always good in after lunch training session.Today I came across this clip on YouTube that explains tagging. This is so well-done using just some scraps of paper that have been cut out! The first thing I thought was, “Why didn’t I think of that!” They’ve actually done a lot of clips like this, so it is worth checking out and seems like it would be a good way to introduce folks to some of the more intimidating 2.0 stuff.