The activity can be run simply as a soldering workshop, but it can also be used to teach additional topics. One can discuss how the human eye works (rod cells and three types of cone cells), discuss how computer screens work (studying screens under a magnifying lens, RGB color spaces …

In this activity students design a multicolor LED bracelet that responds to their movement. They learn about color theory, light, and even kinematics and vectors. Depending on how advanced they are, one can discuss trigonometry, even series expansions.

The students have complete freedom over what the response of the bracelet …