Got my kids uncle a kit a while back, it came from Canada, had spores and some kind of rolled up mat made of stuff for the spores/shrooms to grow on and consume.
There were some instructions about temperature, humidity, light, etc, but he said it was pretty easy.... and he would assure you they "work" just fine. He is stuck in rural Iowa for now so I cannot personally verify, but he says they grew very well(he sent pictures), and were very enjoyable.
Don't remember the variant, I think I picked it as a beginner strain (low difficulty and risk of failure).