Each group needs:

• Arduino Uno microcontroller board, such as the SparkFun RedBoard (see Figure 1) for $20 at https://www.sparkfun.com/products/12757
• USB cable for connecting the Arduino board to a computer; such as this USB mini-B 6-foot cable for $4 at https://www.sparkfun.com/products/11301
• 1 LED (see Figure 1); such as this basic red 5-mm LED for 35¢ at https://www.sparkfun.com/products/9590 or 20-packs at https://www.sparkfun.com/products/12062; if planning to complete the companion activity, Build Your Own Arduino Light Sculpture! Part 2, it is recommended that you purchase the packs
• computer with Arduino IDE (free to download) and FTDI drivers