actually you don't need a kit, a small plastic bag with compost will do, and for spores use some button mushrooms from the store. I tried to grow button mushrooms using a guide from e-how or something, got the healthy layer of spores but when I added another layer of compost the whole thing just died, I guess it's because the area was not ventilated at all and those mushrooms grow in meadows, and the temperature have some influence, I guess the usual room temperature should do well, I will try to grow them this year, If successful I will make the instructable. I will let you know about that.