Ultimately, he Had been the one to offer doing some cleaning. And it's not exactly something he has to do often, carefully sorting the pieces around. For some reason though, as LO finishes with that-

"...pf...Pffhaha..!" He laughs.

He quickly stops though. "Uh- ...sorry, I just... ...a lot of these, the ones I think I've seen people playing... ...all of them were adults, you know?" The boy rubs his head. "I've never even seen other kids play these, in the end..." He hasn't seen other kids at all until the train, not really, but that aside.