Survey of personal projects needing specialized equipment

Hi friends, this is an informal survey that seeks to know:

  1. Whether you take up projects out of interest or hobby or to seek knowledge.
  2. Whether these projects require specific instruments that you acquire (or borrow or make – purchase and price not relevant). Name┬áthese instruments (with maybe some explanation if it is something obscure or un-Googleabe)?
  3. What is the nature of the projects.
  4. What is your educational background (no matter how impressive or not or irrelevant to project)?

Please reply in as much detail as you like in the comments. Feel free to mention multiple projects/experiments and their relevant instruments.

Thank you.