Lets start at the very beginning,
A very good place to start.

When you read, you begin with A-B-C.
When you sing, you begin with DO-RE-MI.

Children:
Do re mi...
Do re mi...

Maria:
The first three notes just happen to be: DO-RE-MI

Children:
Do re mi...

Maria:
Do-Re-Mi-Fa-Sol-La-Ti...
Oh, let me see if i can make it easier...

Do: A deer, a female deer.
Re: A drop of golden sun.
Mi: A name I call myself.
Fa: A long, long way to run.
Sol: A needle pulling thread.
La: A note to follow "Sol."
Ti: A drink with jam and bread.
That will bring us back to Do... oh oh oh

Do: A deer, a female deer.
Re: A drop of golden sun.
Mi: A name I call myself.
Fa: A long, long way to run.
So: A needle pulling thread.
La: A note to follow "So."
Ti: A drink with jam and bread.
That will bring us back to...

Children:
Do: A deer, a female deer.
Re: A drop of golden sun.
Mi: A name I call myself.
Fa: A long, long way to run.
So: A needle pulling thread.
La: A note to follow "So."
Ti: A drink with jam and bread.
That will bring us back to do.

Do-Re-Mi-Fa-Sol-La-Ti-Do....So Do!

Now children, Do Re Mi Fa Sol, and so on...
Are only the tools to build a song...
Once you have these notes in your head, you can...
Sing a million different tunes by mixing them up!
Like this:

Sol-Do-La-Fa-Mi-Do-Re

Children:
Sol-Do-La-Fa-Mi-Do-Re

Maria:
Sol-Do-La-Ti-Do-Re-Do

Children:
Sol-Do-La-Ti-Do-Re-Do

Maria
Now put them all together!!

(all)
Sol-Do-La-Fa-Mi-Do-Re
Sol-Do-La-Ti-Do-Re-Do