As happens occasionally, this exchange seemed to come from out of nowhere. I was sitting at the kitchen table with my laptop and the Maker was nearby working on some project. It reads like it was a short conversation, but there were long (5-10 second) pauses between each question and response.
* * *
The Maker: A moment is a space of time.
Schooldad: How big a space of time?
M: As big as you want.
S: Is a year a moment?
M: Yeah. It's possible to be a moment, yeah. Well, a moment is a short thing of time, I think, a short space of time.
S: How short?
M: At least a minute. Two minutes is probably the maximum of a moment.
S: So a moment can't be longer than two minutes?
M: Well, I don't know. I'm guessing two minutes is probably the max.
M [contemplatively]: "A moment is a short period of time."