Using these LEDs is easy! First, decide where you want to place them on your breadboard. They fit right in without any hassle. Just connect them according to the forward voltage requirements - red, yellow, and green LEDs need about 2V at 20mA current, and blue and white ones need about 3.3V at 20mA current. When handling them, be gentle as they're small and delicate. Keep them away from moisture and extreme temperatures. If you're not using them right away, store them in a dry and cool place. If you run into any problems, refer to our 'Introduction to using LEDs' tutorial for more help.