Just making sure everyone knows of 1) Bill Mauchly's videos https://www.youtube.com/@BillMauchly/videos 2) The wonderful followup to "The Secret Life Of Machines" is the 'Secret life of Components' https://www.youtube.com/@timhunkin1/videos This channel is about Tim Hunkin's work. It includes his TV work, arcade machines, public clocks and his recent youtube 'Secret life of Components' videos. 3) for purely mechanical devices, see Brad Litwin https://www.youtube.com/@BLitwin/videos http://www.bradlitwin.com/ These are the works of Bradley N. Litwin, kinetic sculptor, musician, self-made madman. Here, you will find all kinds of mechanical stuff, ranging from the miniscule to pieces that fill a proscenium stage. And, Brad is the inventor and maker of MechaniCards, an affordable collection of "mechanundras," designed to be mailed, presented as unusual gifts, or just zoning out, while playing with them, on your coffee table. and so much more! -- jeff jonas