Holiday Lights! is a set of soldering kits made by Digistump and sold via Kickstarter in December 2016: https://www.kickstarter.com/projects/digistump/holiday-lights-interactive-kits-delivered-for-the/

The following resources are to help you build and use your kits:

TUTORIAL: Assembly of your kits

TUTORIAL: Using the Holiday Lights Web App

TUTORIAL: Using an Oak with your Holiday Lights!

TUTORIAL: Using Holiday Lights with the Arduino IDE

Sources: EAGLE Files: holiday_lights.zip Tree Factory Program (Arduino Sketch): tree_final_2_.zip Menorah Factory Program (Arduino Sketch): menorah_final.zip Dove Factory Program (Arduino Sketch): dove_final.zip