Anna Fenina site
Jay Mohler site
Valeriya Guryanova's site
AND....Find out that mandala is originally from America yet....Really? I share my knowledge with my daughters, which are working in Summer Camps.
And still I am collecting materials my daughter, got my ideas and make it in her own way. They pin their mandalas on stick and spin they between their hands to look how colours mixed. They realize some mandalas had very pale colour , close to white, some more brown, some more green. They discussed rainbow and how colours by mixing become white.
Look what they got!