Simple Machines

Early elementary students are fascinated when they first learn about simple machines.  I remember myself, learning in kindergarten or first grade about the basic mechanical machines:
- level
- wheel
- pulley
- Inclined Plane  
While it's fun to to get hands on, most people teach this also in a virtual style.  The Science4Us people have a great song that teaches about the basic machines, and I quote:

Work Smarter

This three-minute animated music video illustrates how simple machines are used daily to make work easier and smarter, not harder. Following the video, students use their digital Notebooks to fill in song lyrics with the correct simple machine, then identify non-examples of the correct answer.

BTW, this Simple Machines song has been put up on Youtube and  has 22K views already.