There's less the further back in time you go, of course, but a few 20s examples: * Westinghouse desk fan. Tanky and moves a ton of air because it has essential

There's less the further back in time you go, of course, but a few 20s examples: * Westinghouse desk fan. Tanky and moves a ton of air because it has essentially no grill, but I do have it on a kill switch to protect little fingers. * As @zamnos mentioned, radio. I have several consumer receivers and amateur transmitters from the period. These fall less into the "best" category for obvious reasons, but are more for kids' historical context. I'm exploring arcane combos like a cassette player + tiny AM transmitter + antique radio. Sort of a [mono] stereo with a non-all-you-can-eat music library combined with experiencing the physicality of RF propagation. Also they have standard 1/4" headphone jacks! * Many books around that age. Tom Swift, Oz, etc. * A few kitchen gadgets like an electric waffle iron and a hand grinder (I do have modern ones too).