They enjoyed it so much. They enjoyed creating something of their own and then watching the "hair" grow.
I believe they learned far more from the playful and enjoyable experience than they would have, had we just discussed the different types of soil.
Here is a link to the steps I found which were very helpful.
I did however notice that our grass took more than 10 days to grow. It obviously depends on the type of grass seed, the soil, as well as the amount of light the Sammy was exposed to. We had a couple of very rainy days, and very unhappy Sammies. But as soon as the sun came out we would put them outside and they turned out rather happy indeed.