Everyone was happily moved onto the surface. Frisk, Sans, Toriel, and Papyrus all lived in a two story house together, while Undyne and Alphys lived in a smaller house across the street.
Frisk had just turned 11 and for their birthday, they were going to the amusement park. Frisk was just about ready to go, but when they were coming out of their room they heard their adoptive parents talking, Toriel and Sans. Toriel married Sans 2 Years ago and they've been pretty happy together. Toriel to Frisk was the real parent while Sans, well they just didn't feel comfortable calling the guy dad.
Anyway, Frisk heard Toriel talking to Sans about the amusement park trip. Frisk wasn't one to eavesdrop, but they got curious when they heard Toriel mention their birthday. "Sans dear, please it's Frisk's birthday!" Toriel begged.
I know. I'm just… tired," Sans sighed.
"Yes, perhaps. Frisk has noticed inactivity with you lately"
Sans sighed again, "kid..."
"Can you please go? Just this once?"
"Fine. I'll go. I don't want to let them down. Not again."
"I'm sure they will be elated, dear."
Frisk gasped as they took in this new information. They ran straight into their room and started ranting. Frisk had started talking more as they grew older. While they were ranting, Flowey looking rather annoyed kept yelling at them to shut up, but Frisk ignored him. "Should I talk to him about it Flowey?" Frisk asked breathing hard. "You could die," Flowey stated. Frisk ignored that comment and pretended as if Flowey said yes. "you're right! I should talk to him!" Frisk hugged Flowey and he started freaking out. Frisk walked out of their room, giggling, looking for Sans.
They found Sans on the couch. Frisk climbed up on Sans lap and called his name. Sans opened his eye sockets a tiny bit. "S'up kiddo?" Sans said.
"Are you sure you want to go?" Frisk asked.
"Yea of course I do!"
"you seem a bit—"
"tired? Kid look. I'm fine!"
"sure?"
"positively."
They shared a hug and that's when Toriel walked in. "Oh! Frisk dear, are you ready?" Toriel asked. Frisk nodded their head. "heh. Kid wanna come with me to get Undyne and Alphys?" Sans asked. Frisk shot up and ran for the door eagerly. "guess that's a yes," Sans laughed as he opened the door for Toriel and Frisk to go through. Papyrus was already outside and Frisk didn't know how long he had been waiting there. Papyrus waved at Frisk and Frisk waved back. Sans and Frisk looked both ways before crossing the road. When they got to their house, Frisk rang the doorbell. Undyne answered the door.
"Hey punk! Ready to have the time of your life!?" Undyne yelled. Alphys came a few moments later. "I- I'm ready!" With that we all crossed the road to the van where Toriel and Papyrus were waiting. Toriel sat in the driver's seat with Papyrus in the passenger's seat. Undyne and Alphys sat in the two middle seats and Frisk and Sans sat in the back. Frisk was confused why Sans didn't sit up front with Toriel. They guessed it was because he wanted to spend more time with them, even though Sans fell asleep.
The trunk had some supplies in there and Frisk was in the backseat so it would be easy to grab something. They grabbed a blanket and wrapped it around Sans. He groaned and twisted and turned to get comfortable with the blanket. Toriel was discussing things with Papyrus, Undyne and Alphys were watching anime, and Frisk was just playing on the games on their phone that Alphys installed for them. 30 minutes into driving, Toriel asked looking though the rearview mirror, "Frisk? Are you ok?" Frisk gave a thumbs up. "would you like a song?" Frisk shook their head. "SMALL HUMAN! IT IS YOUR BIRTHDAY! YOU SHOULD PICK A SONG!" Papyrus told frisk. Frisk put their thumbs down and shook their head with their tongue out.
Frisk didn't notice that Papyrus had been working on something. They made noises to get his attention and pointed at the object. "OH, THIS? IT IS WHAT THEY CALL A 'RUBIX CUBE' IT IS VERY INTERESTING!" Papyrus exclaimed. Papyrus was actually pretty good at solving it. When they finally made it to the amusement park, the parking was horrible. When they found a spot, Frisk woke Sans up. They had to wait in a line to get in, but that only took a few minutes. Finally, they got to the front and Toriel fished the tickets out of her purse and handed it to the ticket guy who looked a bit distressed but let us in. Frisk saw some monster that they knew and some they didn't. Everyone kept walking.