Crystal radio anyone?

One of the earliest memories of radio and music I remember was from when I built my first crystal radio set. It had those spring things you used to connect the wires. It came with everything needed including an ear plug. Unfortunately I could only pull in one station, and it signed off at around 6pm. Sheesh! Remember when stations would actually sign off? Now I feel old
The thing that blew my mind was there were no batteries! Damn! Radio waves were just flying around waiting to be captured!
Anyone else have a crystal set that they remember? I may have to try building those "trench radios" from WW1 just for fun
md