You can say: ايول احسنت بابا ايول دمت گرم But we use these words when someone talks or does something amazing. For concerts we say: دوباره دوباره! Which means: Again again!

well, I think you can say ای ول (Ey val) عالی بود (it was excellent) دَمِت گرم (well done) or just listen to others and say whatever they say :)

Another way of saying that is "mashalla!", however It is not a completely Persian word but some people shout that in concerts, It is like a cheer in that situation. Also in my view the word "Afarin" is not just for the children, we can use it for adults too if we say it in a serious intonation!

You can say بارکالله as well, which is another way of saying well done! bravo!

OK, thanks. That's interesting.