Mushrooms on a book. I bought a kit for growing oyster mushrooms which involved soaking a paperback in water and then distributing barley impregnated with spores throughout the pages.
After a couple of weeks the mycelium had grown all over edges of the book. At this stage the book is put in a fridge for a few days to shock the mycelium into producing fruit bodies, and after that things start to get pretty exciting and a little bizarre…..
The final crop was only a few mushrooms, the biggest of which was 10cms across, and the smaller ones seemed to shrivel up as the energy was put into producing the "winners". Another crop can apparently be started by re-chilling the book.
Great fun and no doubt the most use this particular tome has ever been….