[Mako's a better teacher than he gives himself credit for. ]

Huh, so waterbenders can't just create water from nothing? I think I remember talking to your brother about this, actually. How he was looking into different minerals to see if he could bend them, depending on their sediment ratio.

[He sciences at bending before now- but it wasn't part of his skillset then. He nods, still squinting at it.]

Right, right. It's not to be treated as something separate to you. I...I think I can understand that.