Trujillo repairs and builds string instruments for clients around the world–his most famous client is probably Bob Dylan–and is ensuring the craft stays alive by teaching it to his 11-year-old son, Daniel.
Which means Daniel has more hand tool skills than your average sixth-grader. So when it came time for him to submit a science project for school, they chose a rather unconventional topic: Daniel built, from scratch, three different single-string, cigar-box-style violins using different blends of wood with each.
The Trujillos then used an audio-sensing smartphone app to see how each blend of wood affected the sonic quality of each instrument:
Well, that blows the doors off of my baking soda volcano.