Prompt: "Imagine Person A of your OTP [finding and giving] Person B a box of train tracks and a mechanical train… while they go to the store. Person A comes back and Person B is building an express way throughout the whole [apartment]."

"Chell?" Wheatley nudged the door open with his back as he stepped into the apartment. "I'm back to say, Lillian next door, y'know, our neighbor, wanted to know if we could do anything with these? Dunno what she thought we were going to do with them, but she went on some spiel about how her kids have left and how her daughter, Analise, and her wife aren't going to adopt so she's just had these toys in storage? So she's handing them to us because she thinks we'll use 'em sometime?"

Chell looked up to Wheatley, who was standing in the doorway holding particularly large box. He had just left to do the shopping, and suddenly was back? What was even in the box?

She stood up from her chair to peek inside the open flaps, and saw multiple skinny wooden blocks, with ruts on either side, and some small train cars. She recognized these. She often saw them at the toy store when they were out. Wheatley enjoyed watching the intricate set ups they saw whenever they had time to go in with they were out shopping or walking.

"Maybe," Chell stated simply, as she looked up to Wheatley.

"It… is okay if we keep them, right, luv?" His face was hopeful, and Chell could also see the start of a pleading look, something she had taken to calling "Wheatley's puppy-dog eyes". And it was a look that she found difficult to resist.

"…I suppose. Leave them here."

He instantly put the box down and placed his hands on either side of her temples, giving her a kiss on her forehead. "You're the best, dearest! I'll be back soon."

Chell nodded, watching as he walked out the door. She, on the other hand, went back to working, but found it harder to focus. Her eyes kept darting towards the large box sitting just inside. There had to be a ton of tracks in there.

…How many curved pieces were there?

Wheatley opened the door, and yelled out, "I'm home!" as he shut the door. Taking two steps while aiming for the kitchen, he found himself nearly tripping over a bend of track and a small sign signaling a U-turn.

Putting the bags down, Wheatley gingerly stepped over the set-up, only to see more tracks winding throughout the apartment, going under the sofa, table, chairs, behind the television set… even one point where, instead of just using two parts of the hill, one went up onto the table and came back down using the other side.

Wheatley was impressed. But it kept going.

As he turned into the hallway, he saw Chell building the next section in the bedroom. This one had a train station with a couple small people standing on the platform, and the train with three passenger cars and a caboose was waiting in front. Chell was across on the other side, finding a way to connect the two parts of the curve so it would link back out into the hallway.

"Dear?" Wheatley couldn't help but laugh while he spoke, and Chell turned in alarm, blushing red from embarrassment.

"This is amazing." He crossed the room in a couple strides and gave her another kiss. "You truly are a remarkable woman."

She accepted the compliment, and after Wheatley took his coat off, he helped her build more of the track, adding crazy twists to the perfect order of the system, but Chell didn't mind.

That just simply made it more special.