Unfortunately, due to lack of supplies in the middle of the pandemic (I'm writing this review in May of 2020), I was unable to do the experiment as it is described, but I have done this experiment in the past. When I did this experiment with a class, it went over very well. I was doing it as part of an after-school enrichment class, so we built it the first week of class and (with the teacher's permission), we left it there for the duration of the semester. The kids were very proud of it.