Fidget spinners could be used for cheap, off-the-grid blood testing
MX5 Centrifuge with Swing-out Bucket Rotor & 24-place 3-10ml Test Tube Inserts, 110v - Jorvet
Amazon.com: Enjoy Myself Sensory Hand Fidget Spinner Toy, ADHD Autism Anixiety Stress Relief Gift for Adults Students and Kids (Medium+Large) : Toys & Games
A fidget spinner for point-of-care diagnostics | Nature Portfolio Bioengineering Community