So, I know this isn't possible yet because he's only just about to turn 5 months but today when Jake and John were lying on the ground together, John kept saying, "Say 'dada'," to Jake like he has been since the day he was born. Jake was saying all sorts of things and was kicking and batting at the toys and giggling and having a great time. All the sudden he grew silent and was focused on John. John repeated himself again and all of a sudden Jake hollered out, "DA!" It was sweet.
And then, later John was putting him down for some play time in his crib and John was able to witness for the first time Jake rolling from his tummy to his back! :) I saw Jake do it 2 weeks ago but he hasn't done it since. He did it twice for John today.
Big day at the Tutas house.