Right. Give me a second. I'm going to separate out one of each symbol and give the rest to you. Then I'll set it up for her and let you know when you can start

He does that, then shuffles them expertly and hands the stack of twenty over to Tyler. He then spreads out the symbols in a fan on the bench in front of him.

"Hey, we're going to try a new game," he tells Isis. "Tyler's going to look at the cards behind my back, where neither of us can see them. You're going to practice looking into his head so you can see the ones he's looking at. Okay?"