@Tomohaire Thanks for the comment, and excellent questions. To increase scale, I hope to make at least a few copies of the physical library, with a plan to donate some to science museums for public display. An additional copy will travel to various schools in the NYC area, as part of an existing after-school science education program. Finally, I hope to make the plans open sourced for other schools and museums to make available. Near term usage will be measured by QR code accesses for each exhibit, which we will correlate with direct observation research. Measuring ultimate impact will be tricky; there is an embedded hypothesis that technology literacy will improve society. (I happen to agree, but it is debatable). As this library is part of a larger STEM education program, we will follow their metrics of increased number of STEM applicants through its programs. Advice greatly welcomed!