Here is another fun project for those of you interested in learning electronics and building interactive gadgets. The Interactive Geodesic LED Dome has 120 triangles with LEDs and sensors. The dome is programmed with an Arduino to light up and generate a MIDI signal depending on where you watch.
You can think of this as a giant musical instrument with LED lighting. It can be used to put on a fun light show. You are going to need an addressable LED strip, Arduino Uno board, 120 IR sensors, and a few other components to complete this project.
You can find the instructions here.