James had, indeed, talked Lily's ear off about this new book he'd gotten while assisting her in obtaining and setting up their furniture. The thing of the matter was, there were metal dragons that were run on magic. If that wasn't cool, he obviously was lost on the word cool. He would have to talk to his other grandson about it. Perhaps he'd send him an owl.
As their guests arrived, he walked with Lily to let them in. He smiled cheerfully towards Remus, Sirius, and Jamie before casting a somewhat cautious look towards Regulus. He would be polite for the sake of Remus and Sirius, but it would be difficult if the other man was rude. So, if there was any luck, both of them would get through this in a gentlemanly fashion.
"Hello everyone." He paused, taking the bag. "Oh. Thank you," he said smiling toward his grandson as he peeked in the bag. "It's a lovely gift, and welcome to our humble abode...or whatever you're supposed to say at these moments."