YouTube is fun to use because there are so many random videos to find. You can learn new dance steps, find dinner recipes, learn how to make paper mache, or just laugh at all the fools who posted their videos. The content of the videos is open so people need to take caution because anything will come up. Using this site for classroom purposes would be a great tool to help explain or demonstrate an activity/lesson. YouTube is easy and convenient and kids are very familiar with it so it can be highly useful for any classroom. For learning how to create arts and crafts projects or class activities there is TeacherTube which is teacher version of YouTube. I have used this tool and it is great because real teachers post their videos of different activities.