Isaac's always been a tall kid, but now it doesn't feel like the height is such a problem because for the first time in ages, he's not actually thinking about how tall he is or how uncoordinated that might make him. Instead, all he's thinking about is the fact he's made a kind of new friend. Isaac clambers into the middle, preparing himself by gripping the bars tightly. "We can trade after," he says breathlessly, not wanting to be selfish.