Looking for answers: magic bracelets and students' creativity
One of the activities in the Science Workshop was to investigate the response of bracelets made of white beads to different sources of light: lamps of various sorts, darkness, sunshine, etc.
Only I knew beforehand that the beads respond (and change to different colors) to the UV component of white light.
The problem was that the Sun was not shining!!! And most of the lamps in the nice hotel we stayed in apparently had very little UV-light component (which is a good thing!).
Another difficulty, which turned out to be a minor one because of the creativy of the 25 students, is that we could not open a window and try to explore the behavior of the bracelets outside the window, because we were in the second floor of the hotel, precisely where the little children playground place: the students rapidly realized that the windows were blocked for security reasons.
A few minutes later I found out that a group of students were experimenting with the bracelets: they just went to a different floor and located a door that opened into a terrace! Here is the proof that "some" Sun was doing its work:
