In these demos, at least for the fade example, you'll need:
A small breadboard: This type of solderless circuit allows you to build electronic circuits without any soldering while being reusable.
An LED: We'll use a 5 V LED.
A resistor: Depending on the LED type, color, and manufacturer, different resistors will be required. To be able to support a wider range of LEDs, let's use a 1 kΩ resistor. This resistor is represented by the color code brown, black, red, and silver, and it will help you avoid damaging the LED.