Getting started

First things first!

You need a pot. And may it be a nice pot ( I used a bonsai pot). Any shape and size will do just fine, just make shure there is a hole on the bottom for the water to exit.
Praparing the pot:
-cover the hole on the bottom with a mesh thet is dense enough for the soil not to fall thru.

-fill the pot to the top with soil or any kind of substrate and compress it with hands from top to bottom.
-cover the entire surface of the soil with grass seeds
-throw some soil on top of the seeds, just to cover them.
-water the pot
-wait 4-5 days :)
Then you will have this

Why you need this...

If you have tried to:
-grow a bonsai
-buyed a bonsai
-seed a bonai from seed
-tried to grow anything
...and it died.
you may be expiriencing, what many others are too. FAIL
YOU ARE A PLANT KILLER!
so...
STOP KILLING PLANTS!!!
and read this:
The whole idia is to relax yourself! :) 
Many have tried to grow a bonsai in complex ways and failed. Me too!!! So I figured out that there is no need in stressing yourself with things you are suposed to relax. I killed a dosen trees in pots and countless seedlings too. 
I was about to quit this urban greenery until I discovered rey grass. It is cheap, it is quick, it is durable. Most important, it puts a green loan everywhere you like: desktop, shelf, table, floor... everywhere you like.