Yes there are a few uses for that:
-To give emphasis to a sentence, eg. Tι ήταν κι αυτό βρε παιδί μου! (My god, what just happened!)
-To something absurd, you can say: Tι λες παιδί μου; (What are you talking about?). It's a bit rude.
-Old people use it a lot for anyone younger than them.
To be honest it's a bit obsolete, as a non-native I wouldn't bother with it =)