The latter part of Ed's comment makes something jump a little in Oswald's chest, like he's been spotted doing something he shouldn't, but the reply that comes out of his mouth is kind of unexpected and a bit of a verbal stumble.

"I have that!"

He pauses, realising he's kind of sat forward while speaking before slowly settling back as if doing so will diminish the attention that might be drawn toward his excitement.

"The-- what you made. I.. arrived here with it. Of all things."