None the less, I think yeast is amazing, and have always vaguely felt like trying capturing some wild yeast.
So on Sunday, I made a flour and water mix and left it on the mantlepiece, and now I have a large enthusiastically- bubbling thing already! It certainly *smells* very bready. I am waiting for it to finish eating the second lot of flour I fed it and start to look a bit hungry before I feed again. I wasn't expecting it to take off so fast, so I didn't mark the jar after the first feeding, as shown here. I marked it at 10:30 am today instead, since it was clearly growing enthusiastically, but I'm not sure if it has quite doubled in size since yesterday. I shall wait and see what it does next! I'm hoping it will run out of food and start to shrink, so I know to half it and feed it.