Jamie rolled his eyes. Kids so weren't his strong suit. He walked to the kid's side (who hadn't introduced himself, by the way - rude) and looked at the hearing aids compared to his ears. Jamie frowned but muttered a word and they shrank to a more appropriate size and hoping that would help. He didn't know much about that sort of thing after all. Someone, he wrote with his wand, is messing with us. But who? That was the question.
Put those in and stick close. I need you to watch my back, okay kid? Unless the blonde kid was part of the trick and was some sort of polyjuice nonsense. Jamie couldn't be too paranoid because then you didn't trust anyone and he needed some sense of security. So he gestured with his head towards the door and started that direction, wand at the ready.