In the moveable do system, do is only the tonic if the song is in a MAJOR KEY!  If it's a minor key, la becomes the tonic.  If it's in the Dorian mode, re becomes the tonic.  In this video, you said the solfege as if you were singing the dorian mode (re, mi, fa etc) but the pitches you sang were just the MAJOR SCALE AGAIN!!!!!  (which by the way means you MOVED re!)

It sounds like you have a fundamental misunderstanding of pitch training.  As I said, whichever system you use, fixed do or moveable do, the intervals between each pair of notes must always be the same.  do - re is always a tone, re - mi is always a tone, mi - fa is always a semitone, fa-so is always a tone, so - la is always a tone, la-ti is always a tone, and ti-do is always a semitone.  

 

Dear Fludo,
Yes, MAJOR SCALE is built Tone Tone semitone Tone Tone Tone semitone or (in USA they say) Step Step Half step Step Step Step half step


And 3-year old kids don't have to know about that, like they don't have to know about dorian, frigian, lidian, mixolidian, hecksatonic, pentatonic and all other... staff. Even about MAJOR and MINOR scales they don't have to know. They care less.


You are right: the FEELING and intuitive understanding between the notes that they sing - this is what matters.

 

You think, that they do it better, if sing only Do Re Mi Fa Sol in any Major key. I placed a video for you proving that kids are perfectly all right to sing it in Re major and all many other majors, And Minors. They fasten pitch of the note to its name. Sharps and flats they learn first on intuitive level and theory comes later.



This is the way most of the world was taught (except English speaking countries).

 

What we have as a result? Perfect pitch development, ear training, fun vocal learning, brain development.



 

On this video is a renowned Russian music teacher Maltzev with his little students, As you see, kids hear perfect pitch of every transposition that their teacher takes.
It is very sofisticated plays of minds and well developed music ear, Such education bring kids into playing in ANY tonality, writing ANY melody by ear and being really proficient in what they are doing:

http://softmozart.on.ufanet.ru/smbookeng/music09.htm

"A moveable "Do" is just as nonsensical in the science of music as a moveable "A" is in the alphabet, when each letter that we start from could be "A." 

Once, the Hungarian composer Zoltan Kodali (1882-1967) invented a system of relativity for choir education. The system allowed illiterate people to learn to sing in choirs without having to waste time on learning all of the notes and their tonalities. Kodali applied the very beginning of learning, the sounding-out stage, but limited it to the very minimum in order to simplify things. Instead of notes, he implemented seven hand signals for the conductor’s use. It was as if he reduced music to the simple relationship between the seven steps of harmony. This system, as there wasn’t any better, was embossed into good practice specifically for people who didn’t have access to musical literacy.

Unfortunately, Kodali’s invention, originally created for a strictly utilitarian purpose, was carried over into music classes in countries that use the Alphabet System, thus worsening music education. Singing in Solfeggio has been assigned to only one scale – that of "Do!" No matter what tonality music actually sounds in, the Tonic is called "Do." It has become impossible to sing Solfeggio in any other tonalities. Solfeggio’s connection to Kodali’s system hasn’t improved it, but has reduced it to the singing of seven notes. Ever since, all other tonalities have been studied without practical application, exclusively with the help of the Alphabet System and without vocal sounding.

There is a simple solution to this problem: take away the moveable "Do," but keep the most important element of Kodali’s system – familiarization of tune with the assistance of hand signals. Of course, starting music education with the one simplest tonality, Do Major, should be allowed. The use of Do Major to teach the relationship of the different steps to each other is entirely justified. But the singing of real music comprises of all of the notes in Solfeggio in all 24 tonalities, and should be a crucial stipulation of any music education."

<a href="http://www.youtube.com/v/-thPcTOzzNU&rel=1" target="_blank">http://www.youtube.com/v/-thPcTOzzNU&rel=1</a>

Here is a video, how to teach your child Fundaments of Solfegio

<a href="http://www.youtube.com/v/WDzJDPZOLYM&rel=1" target="_blank">http://www.youtube.com/v/WDzJDPZOLYM&rel=1</a>

[How to: Learn Duration of Music Notes with Soft Mozart]

I hope, this links would be helpful:

How to: Learn Duration of Music Notes with Soft Mozart
<a href="http://www.youtube.com/v/BCowCy5t71g&rel=1" target="_blank">http://www.youtube.com/v/BCowCy5t71g&rel=1</a>

How to: Identify the Piano Keys with Soft Mozart
<a href="http://www.youtube.com/v/KLyN0OuYpIc&rel=1" target="_blank">http://www.youtube.com/v/KLyN0OuYpIc&rel=1</a>

How to: Learn Order of the Piano Keys and Music Notes in Conjunction with Soft Mozart
<a href="http://www.youtube.com/v/Io1eZ03j-TY&rel=1" target="_blank">http://www.youtube.com/v/Io1eZ03j-TY&rel=1</a>

How to: Read Music By Distinguishing Lines And Spaces with Soft Mozart
<a href="http://www.youtube.com/v/PGTFUxB5ZmE&rel=1" target="_blank">http://www.youtube.com/v/PGTFUxB5ZmE&rel=1</a>

How to: Read Music Notes on Grand Staff with Soft Mozart
<a href="http://www.youtube.com/v/DNJMnC0tsQ8&rel=1" target="_blank">http://www.youtube.com/v/DNJMnC0tsQ8&rel=1</a>

The entire channel is here; http://www.youtube.com/user/lenkaolenka?feature=mhum