They're, uh, vehicles--[She's never had to explain planes before, give her a sec]--here, I'll draw it.

[Kay draws an airplane as viewed from above, a bit awkwardly. There's a reason she doesn't illustrate her own stuff.] You get into this part, right? [She indicates the body of the plane.] And when everyone's strapped in, they get it going fast enough that it lifts off the ground--and then there you are, thousands of feet above the ground until you touch back down somewhere else. Would you try one, if someone offered you a ticket?