silver fish
Daguerreo-Punk
TL;DR -- Silver-coated glass will naturally form "Neural Networks" (our recent and hyper-successful sort of artificial intelligence) when you shock it with electricity. The sparks melt the silver, forming wires that grow like roots, and it will find whatever patterns are waiting in the jolts of your encoded data. It learns on its own! Silver wants to form a brain. The silver plates are nowhere near as efficient as our modern computers, yet they would have been easy to discover, and they only require simple tools to get working!