Thank you everybody!
I found this forum by "googling" something, so decided to join.
Although I am in lithuanian parrot forum as well, but more information and to share the opinions are always good.
And about the age of my parrots...
Well I have bought them from the market, so it is difficult to say exactly, but the girl (yellow) is about 5 months, maybe a bit more, a boy (blue) is pribably round 9 months, maybe a year.
It is a difference in their eyes, and the waves on their heads are different also, which allows me to judge about their age differences.
But they are friendly with each other, luckily ...