As soon as they approached, a familiar voice came into everyone's ears. Adam and Juno looked at each other and smiled.

When I walked in, I saw an exquisite toy train on a circular rail model in the garage, which was moving rhythmically.

Next to it, a handsome young man in his fifteen or sixteen years old, wearing a driver's suit, a driver's hat, and a controller in his hand, was happily controlling the train model through the mountain and through the cave.

Not Sheldon, who is it?

"Hi, Sheldon!"

"Hi, Adam, Hi, Juno."

The young man Sheldon looked up and greeted him with a pursed lips, then turned his eyes on the train model.

Adam and Juno were not surprised and introduced to Heather: "Sheldon, this is me, well, girlfriend Heather, this is my good friend Sheldon Cooper..."

"It's Dr. Sheldon Cooper!"

Sheldon interrupted.
Chapter completed!