When did your infant twins start to interact?

[IdahoMom]

I thought I had seen this discussed here, but now I can't find the thread. 

I have 11 week old b/g twins. They're starting to smile at and interact with their big sisters, but they don't really notice each other. I figure they're just such a part of each other that's always there, that maybe they don't notice or realize that the other is independent of them. I don't have anything to back that up, though. :) When did your twins start to notice each other? 

[little birds]

They didn't notice each other much until around 4 months, and weren't really interacting until they were about 6 months.

[annettemarie]

4 months sounds about right for my twinkies as well. Now they're six months and last night Molly had her brother in a headlock. :/

[Strong Mama]

About a week or so ago. They are 4 mnths old as of yesterday.

[Smurfette2]

Well our fraternals sleep very close and one always has her hand in her sister's face. They're 3 months and don't care for each other unless it's time to sleep. I noticed during the day they might glance at each other but other than that... they couldn't care less. I think it's because it's such the norm for them to have that "other person" there nearby that it's more exciting to look around for mommy and daddy and TeenSis. And Kitty. Our fraternals get excited when the cat strolls by.