For those who still long for a tangible connection with film photographs, Polaroid transfers can transform ordinary photos into Impressionist masterpieces.
A typical kaleidoscope contains 2 mirrors angled at 60°, which reflect a pattern to create a symmetrical effect that we can emulate in software such as Photoshop.
About 13 years ago I learned of some military research into a satellite- and missile-defense device that would propel projectiles using Lenz’s law, which governs the direction of electrical current induced by a changing magnetic field.