Back to the Roots Organic Mini Mushroom Grow Kit $10 at Amazon
Amazon has the Back to the Roots Organic Mini Mushroom Grow Kit (1102) for $13 - 20% off coupon (check "Apply Coupon") =
$10 with free shipping on $25+ or with Prime. Allows you to grow and harvest organic oyster mushrooms in just 10 days.
Original Source of Info