We all love lighting up lots of LEDs, so Expansion Pack #1 provides additional LEDs, resistors, and transistors to light up even more LEDs with your Blinky Lights kit! In addition to the red, green, and yellow LEDs, bi-color LEDs are also provided to allow experimentation with LEDs that can be either red or green!

Using the Junior Genius Kits Online Club, you'll find new circuits that get you started by showing how to switch multiple LEDs with a transistor so you can flash 5, 10 or more LEDs at a time!