So I've watched loads of good YouTube videos (especially one from the Guardian with a nice curly-head man) and I totally get what you're meant to do.... But I couldn't find the powdery Clay anywhere. So I've got a big cube of grey clay from Hobbycraft, in transparent plastic wrapper, sort of squishable when you poke it. It says to fire it in a kiln but obviously I won't be doing that. Question is - will it be OK to make a dry mixture of wildflower seeds and compost and then just roll the little damp clay balls in that mixture? Not really sure how to blend the compost with the clay properly, which would obviously be so much easier if the clay was powdered! Feeling a bit worried as I'm leading a seed bomb workshop this week and full of questions. Any experience/advice very GRATEFULLY received! Obviously I will experiment before hand but anybody got any pointers ? Thank you :)