Nick and Jason have most of the info correct.
There is way too much info about the Amish.....it is confusing to me and I have been married for almost 15 years.
The Amish children are indulged with "whatever" they want.... t.v.'s, cars.....you name it. Then when they are in their 20's they are asked to "give it all up" and join the church. Many find they cannot..... But if they do join it is known as a "true leap of faith".
If you respect the Amish you should never take a picture of them. To them that is a "graven image" and is against the law of God. They will be interviewed from time to time...but faces never on camera.
Amish cannot own cars "unless" it is for a business. The business can be fully equiped like any other business... La-*test*-('") technology, electricity and so on. They are allowed to generate their own electricity as long as they are not tied into "the grid". They cannot have natural gas, but can have propane....again "the grid". They cannot have a phone in the house....(here is a tricky one), but are allowed to have one outside. Have you ever seen a little hut along the side of the road? (it's not a shelter for school kids....lol) That is a "phone hut". It is owned by one person, but used by many in the area who do not have one. Funny thing to watch is a house with a lot of children......then the phone rings......you would see kids running from everywhere to see who would get to the phone first... It is apparently a big deal to get a phone call. And of course if they own a business they can have a phone. They are not allowed to play or learn to play a musical instrument. (It is considered to be "idle hands"). And if there is one thing they are known for is WORK. If you have time for "idle hands" you do not have enough WORK in your life. They have their own schools, but are only permitted to attend to the ninth grade. This is changing and many then transfer to public school for more education.
There are many fascinating appliances that are specifically used by the Amish. Anyone seen a propane powered refridgerator? Or gasoline powered washer?
I ain't makin this stuff up.
If the Amish show up at an auction... Game over man! game over!! You had better not want the same item they want....cause they will just bid until they get it. Very deep pockets....
The only thing is that the Amish do not have a form of elders. This is all decided by the minister of any certain group. And God forbid you go against his wishes.
You will be publicly ostrasized in front of the congregation. And they take that shame verrrrrrry seriously.
Church is usually held in a different home each week. When you see a low-slung wagon in the drive of an Amish home.....that means that Church is coming there.
That is the church wagon where all the pews are kept and for the men to hang their hats. Pure German (high German) is only spoken in church otherwise the traditional language is Dutch. Women and men are not allowed to sit together, but in separate rooms or in the summer the barn is used for church and they sit on opposite sides.
There are "black buggy" Amish here in northern Indiana... There are white and yellow and black in Pennsylvania. I think parts of Kentucky and Ohio have some grey buggy Amish. There are "Old Order Amish" and "Old Order Mennonite" These two are the most strict of all....you will not catch them with any of the modern conveniences the other sects use. The Old Order Mennonite have topless buggies. However.....for as strict as these Mennonite are....they are allowed one tractor... BUT....it must only have steel wheels... Reason being is that rubber tires are too "worldly" and are not permited by the church. There are even topless buggy Amish here in Michigan. To tell the difference between Amish and Mennonite.....you have to know the hats and coverings... A single Amish girl will wear bright pastel dresses and a white covering around the house.
A married Amish woman will wear dark conservative dresses and a black covering. A single man will not have a beard.. A married man will grow a beard but never allowed a mustache. Again this is taken directly from the Bible. Something about if you can not see a man's lips move when he speaks he may be lying to you. (again...not making this up). And no zippers allowed on any apparel...again this is too worldly... Man it stinks to have to pee and have to "unbutton" your fly before it is too late. (I guess pee-stains are acceptable

)
The Amish have no insurance for anything..... If your house or barn burns it is taken care of by the Church. Paid for and built for "no charge". And that kind of security is why most stay in the Amish culture. They know as people they will always be cared for by others around them. We could definately take a lesson from them here.
Well....this could turn into a book very easily...... But if you want to know something specific.....just ask... I will get the info for you.
Again.....things are different from sect to sect......your experiences may differ.