It used to be just Taylor, now it's Luke too. He has picked it up so well that it's hard to tell the screams apart now. Luke has more of a un huh un huh un huh in between but she's starting to pick that up too. "They" say twins communicate with each other before anyone else...but does it have to be in the form of a scream? lol It's funny but sometimes it leads to meltdowns which aren't as funny. :)