"You're taller," Benny said, looking at Sally.
"So are you," she said back.
"This is so weird. I feel ... smarter. Why is that?"
"I don't know. Maybe because we're older?"
"How can we be older?" Benny asked.
"I don't know. But I think that's what's happening."
And she would be right. Both of them were now around the age of ten. And with their increased height and weight, they also obtained a more mature mind. They now had the intelligence level of the typical 10 year old.
