They worked in practice even better than they did in theory, generally Tony's preferred method of experiencing the world, but there were a lot of things about Donnie that he didn't understand yet. He couldn't help the grin in return as the kid beamed, nodding to encourage that enthusiasm into something explosive, then followed his gaze up at the shimmer of water, stepping back out of the shed curiously to try to calculate what was so much more magnetic about it.

"We can set up a humidifier in the forge, if that's...I didn't really think about it, you know, listen, I'm not theorizing on just how much turtle you are, it makes sense, that's on me," he concluded, hand to his heart to accept that he might be capable of entirely missing Donnie slowly dying while they worked.