"Oh! That is fairly simple. Like tic-tac-toe, only with an added spot. All right!" Picking up one red and one black in either hand, she holds them behind her and mixes them up before offering him closed fists. "I think black goes first? Pick one!"

Inviting him to touch her. That was a step, right? An example of trust? It was probably too obscure, but... She's trying. It's hard to express.