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

Games. The newest trend says that by using games during learning activaties will stimulate student brains more than by simply sitting down and contemplating. If a student is forced to be sat down and thing, he or she will get "cold" and therefore slow down the time it will take for the brain to do the same amount of work rather than if he or she had to think quickly of what they have to do next.

Another option is competition. Putting students at each others competition once in a while will highly stimulate their activity and therefore make them highly productive. By learning more, they will enjoy the process more as well.