[Alex quirks a brow, puzzled but pleased - somebody else coming out of Ben's mouth, it's weird, but it's got to be somebody Ben liked a lot or he wouldn't be acting this way. It's impossible not to grin in response.]

Yeah, sure. Only if we do this pretty often, though, you know? Or I might get out of practice.

[The very thinly veiled subtext is an invitation. He wants to play. He wants to be a kid for a little while, and if he can, he wants Ben to be a kid with him.]

You wanna do something else?