Arduino is an awesome tool for physical computing -- it's an open source micro controller board, plus a free software development environment. Use it to make cool interactive objects that can sense inputs from switches, sensors, and computers, and then control motors, lights, and other physical outputs in the real world!
Need an Arduino? No problem, the Maker Shed has a complete line of Arduinos and accessories.
Here is our collection of Arduino 101 videos to get you started. Enjoy!
Start by blinking an LED:
Connecting a button to the Arduino:
Using potentiometers and servos:
Fun with the (OLD) Arduino Starter kit v1.0:New version 2.0 does not include these parts.
Connecting an accelerometer:
Check out what people are doing with the Arduino on the MAKE website.