For my birthday, my sister-in-law gave me a gift certificate for a bonsai from a business here in Van Buren. It's called American Bonsai Nursery. It's run by a very nice couple who also sell many by the internet. You should look at their website: http://www.american-bonsai.com
The lava rock that you see is the size of my hand. The tree is called a "Aralia, Ming".