Erwin is about to ask what's wrong when he notices that dark look, concern foiling his eyebrows a bit, but then the other boy ducks to put the jar down (very carefully), and comes back to make the same shape with his hands. He nods enthusiastically.

"Yeah! Just a little wider though-" Carefully he reaches to touch Levi's hands, encouraging him to make a little bit more of a tent shape, just a little more room between his palms. He can't help but notice how small they are, fingers almost delicate, but he's very gentle.

"There, like that!" He smiles, catching the smaller boy's eyes again finally. "I'm Erwin, what's your name?"