"Y'know, they ain't gonna come out any sooner even if ya fidget with 'em."

The jab comes out friendly, however, and Joker pauses where he'd been passing by to grin at the new kid with his one hand on his hip. Oh, he can tell what's probably going to happen, but still. Seeing someone so young play with wobbly teeth... He can't help but be reminded of fond memories.