Earlier, we reported on our mini mushroom farm, provided by BTTR. Once we returned from the hoopla that was our last trip to Chicago, we busted open the second side and revisited the life of mushroom farming. This time, I photo documented the growth starting on the first day that they really began to resemble mushrooms. It only took 4-5 days before they were enormous! This batch yielded two giant caps and a few smaller. We harvested the larger ones and left the others to grow to maturity. We'll see how it turns out. The process is really fascinating and well worth the initial investment of only $15. Pick one up for the kids this summer; I guarantee they will be fascinated!