LED Christmas lights are a popular holiday decoration that can add a festive and cheerful atmosphere to any space. One way to make them blink is to use a simple circuit that includes an LED, a capacitor, and a resistor. The capacitor stores electrical energy and then releases it in small bursts, causing the LED to blink on and off. You can find detailed instructions on how to build this circuit on the internet or in a book about electronics. Have fun with your blinking lights!