It was a little pretentious. Not that Tony didn't have helicopters, because he did. But because even he'd never thought to make one the Iron-Copter. It just seemed... silly. Like something that happened on cartoons in order to get better toys for marketing, or something. He nodded along because he could give Peter that much, at least.
Luckily, the guy seemed into the idea of building something small - maybe not a goober (whatever that was) but not something huge and high tech either. Frankly, it was an easy design. "All it really takes is a metal with holes -- a larger compartment for water and a hand crank." When he was done with his sketch - material suggestions and dimensions listed, because he was a thorough sort of engineer, thank you -- he held it up for Peter, although he supposed he had nothing but time to spare so he'd end up getting up and finding materials right with the guy.
"He's--" The question, or at least the way it was asked, made Tony pause. "Yeah. From my universe. He's mine." Not his exactly. Not his kid, but something. Someone he looked out for and felt responsible for and who he loved in his own right. Someone he had failed. Spectacularly. "I was showing him the ropes."