What classroom tools can teachers use to make learning more enjoyable?

An obvious answer here is that teachers can harness the immense richness of information available on the Internet to enhance and augment the standard syllabus. This allows students to draw from more information and to guide their own learning, but perhaps even more importantly it exposes students to the concept that learning and sharing information is fundamental to the human experience. It demonstrates that knowledge can be a playground. However, I think this is only the beginning. Through social media, podcasting, blogging and YouTube, students have the possibility to network and learn from one another. Harnessing these resources has great potential to make learning a more enjoyable and sociable experience.