Did the same same, oak dust, Quakers. But I bored 1inch holes into a dead oak and loblolly to plant into. They went wild. I knew a nutty old timer who used to pile horse/cow/chicken s*** on top of wet cardboard, cover with refuse, wait.Santa brought me one of those oyster grow kits. It grew great and my daughter and I have started a tub and a few bags using the existing mycelium and supplementing it with oak sawdust and whole oats. We started them Monday and the mycelium growth so far is astounding considering to environment they are in. Hoping they do well and the kid continues being interested in learning.