On Mar 2, 2012, at 11:08 AM, Bryant Patten wrote:

They are particularly fun for schools because they are designed to have easily attached input sensors (light, temperature, pressure, etc) and output devices (lights, motors, etc) making it pretty simple for kids to build stuff that reacts to the physical world outside of the computer.  Great for making interactive art or music projects because at $30 a piece, you have the option of leaving the computer with the art project.

There is a nice collection of projects at http://arduino.cc/playground/Projects/ArduinoUsers  and occasionally there will be display of a class project at the UVM art gallery. Fun Stuff.