I’d give laser pointers to Neanderthals. Even if they did figure out some useful application for them (maybe hunting?) they’d run out of batteries eventually.
Let’s give some ancient peoples a couple books on modern maths and calculus. Really fuck with the development of tech.
A polaroid camera so they can steal each other’s soul
Cool Ranch Doritos
Furbies. Just to see if we end up with a furby based religion.
[Solar powered strobe lights.](https://www.amazon.com/Solar-Strobe-Warning-Light-Flashing
/dp/B08HLL8JQL)Sure the battery will fail after a few years but until then they will have something that won’t exist again for centuries.
If it’s a civilization that hasn’t yet had a writing system, a writing system.
However, I will teach them a (semi-)featural alphabet, kinda like if the Hangeul jamo were its own alphabet. It’d be fun how long the orthography will diverge from the spoken sounds, and how fossilized the orthography can be–and more interestingly, how they might evolve the writing system.
If it’s a civilization that already is using a writing system, emojis that they can use alongside their writing system. It’d be interesting to see if they’d eventually turn into ideograms for human feelings and thoughts.
aluminum bars, they won’t be able to work it into things like with iron. even if they do, they can’t make more
Nuclear bombs
If we’re including eras where people are able to read and write, a history book. They will see their future and will attempt to change it, for better or for worse.
Antibiotics
Talk about butterfly effect lol. I wonder where we would be today if antibiotics were readily available before plagues became plagues.
Me, too. That’s why I wanna do it!
Steam engines, clockwork and balloons. Hopefully they turn into a steampunk society.
Kite & surfboard plus the appropriate colorful dress.
I’d show them once how it is done, then watch whatever happens.
