They will be showing off what they've learned about electronics and programming with the Arduino. Here's a capsule description:
Physical Computing - Electronics with Arduino
This is the beginning of an ongoing project focused on having students investigate and learn about electronics and programming in through inquiry and project based learning. Students are encouraged to push the bounds and learn what they need to solve the problems they face while they are facing them. In some cases they learn more about certain aspects of the material than I, their "instructor", know.
As students learn they share what they've learned on our class wiki, hosted through Google Sites. In this way they actually provide instructions for other students in the class or for future classes.
Arduino is an open-source platform that incorporates an Atmel micro-controller. It is programmed with the Arduino programming language (which is based upon C++). Students learn to use a variety of sensors to interact with their programs.
More Information on Arduino: