(I don't own Harry Potter or its characters, only this fanfiction's plot)

Harry hated floo travel.

It was confined, it made him sick, and left him covered in ash.

Coughing, Harry crossed his arms haughtily as his father waved his wand, banishing the soot. As if it made the trauma go away.

"Hades!" A voice exclaimed, and Harry was soon wrapped up in the arms of Ceres Prewett; his large and inhumanly strong cousin who loved him just a tad too much.

"CeCe, I'm not made of steel.." Harry groaned, not fighting his cousin's affections. Smiling despite himself as his cousin pulled away with a laugh.

"Happy birthday," Harry said. "Daddy has your present."

Ceres looked over at his Uncle, who was talking to his mum. "She won't let me open any until we have cake."

"That's mean," Harry crossed his arms. "You should get to open them whenever you want!"

"Right?" Ceres huffed, "Jokes on her, Uncle Lucy already gave me something."

Harry raised his eyebrows, leaning in to see the strange rock Ceres pulled out of his robes.

"It's a dragon's tooth," Ceres whispered. "He says he killed it himself."

"Killed?" Harry asked, brows forwarding.

"When you make something sleep forever," Ceres explain flippantly, shoving the tooth away before his mother saw. "When he visited you and Uncle Siri in Germany."

Harry didn't quite believe his Uncle Lucy actually killed a dragon- whatever that entailed- as he hadn't exactly mentioned it to him or Draco, but that might've been the point.

"Alright," His father suddenly said, walking up behind him. "Let's go see all your little friends, yeah?"

"Hey Draco! Pansy!" Ceres yelled, making the two in question jump. "Hades is here!"

Pansy squealed and ran over, and Harry did try to escape her.

"Pansy you know he doesn't like that," Blaise lightly reprimanded, coming up behind the group as his mother walked away. She was most likely trying to find him a new father.

Pansy looked up with a grin. She let Harry go in favor of hugging the Italian boy. "I missed you guys! I haven't seen you in forever."

Draco rolled his eyes, "Doesn't mean you have to choke us."

She glared, before a smile broke out across her face again. "Do ya wanna play Gobstones? My Papa got me a new set when we went to Mexico."

Ceres shook his head, "I think a little adventure is in order, wouldn't you agree, Hades?"

Harry smirked, "Oh yes, but what for?"

"The hollow sound under the third floor bedrooms is still a mystery," Draco pointed out. "And Ceres's birthday does give us ample cover to properly investigate."

"In.. In what?"

"Sorry Pansy, I forget you haven't started your lessons," Draco apologized. "It means we'll need to find out what the cause is."

"I think it's probably haunted," Ceres said. "Some old ghost who has nothing better to do than moan in the floor."

"Or maybe," Blaise said, drawing the other toddlers attention back to him. "There's a hole in the floorboards, with a secret inside."

"Like presents?" Ceres asked.

"Or maybe cake?"

"Dede, what kind of idiot would put cake in a floor?"

"I dunno, Draco, maybe someone who knew people like you would never think to look." Harry shot back.

Blaise sighed, "I was thinking more along the lines of buried treasure.."

Ceres eyes lit up, "Ooh, that would be awesome! Come on let's go before my cousins Freddie and George get here."

"Who?" Harry asked, following Ceres with their friends in tow.

"My cousins," Ceres repeated. "They're fine enough, but Freddie and George always get in trouble when they're here."

Harry didn't think he'd ever met a Freddie or a George, so they must've been from his Uncle Iggy's side of the family. Why else would he not have met them?

Sirius sipped on his champagne, listening to Crabbe complain about her latest boyfriend.

"Honestly, he has no sense of fashion," She grouched. "Just look at him, floundering around in those robes- they do nothing for his complexion!"

"Isn't Eric colorblind?" Bulstrode asked, laughing as Crabbe turned to glare at her.

"He could at least take his mirrors advice on what looks good," Crabbe said, picking a cherry out of her margarita. "It's the least I ask."

"Hey girls," Zabini called, her braids in a gorgeous updo.

As she approached, she offered Sirius her hand. "Mr. Black."

Sirius brought her hand to his lips. "I'm still not interested, Stella."

"Drat," Zabini drawled, flopping down besides Bulstrode and grabbing a flute of champagne from one of the passing serving plates. "You'd have been the perfect husband."

"More like I have the perfect sized bank account," Sirius muttered, earning a laugh from the Italian woman.

Grinning, Zabini scanned the crowd of important witches and wizards. "Hmm.. I think I'll try to pick a pureblood up tonight, any suggestions ladies?"

"I heard Patrick Parkinson was single," Crabbe shrugged. "He's cute."

"Nah, I've already tried," Zabini waved off. "He's as bent as Black, his father on the other hand.."

Bulstrode grinned, "Hey Black, maybe you should take a swing at him, eh?"

"What? Because he's gay?" Sirius scowled, "I'm not going to go for the first gay man I see, Denise."

"Yes, well, when was the last time you went on a date?" Crabbe asked, raising her eyebrows.

Sirius felt his face begin to heat up. "That's none of your business."

"I'm going to take that as a 'too long ago to remember'."

"I'm just not interested in dating right now," Sirius looked over at Parkinson. "Plus, we wouldn't work, we don't see eye to eye on a lot of things."

"You really need to get over that," Crabbe groaned. "It's not like you're about to convince any blood traitors you weren't in leagues with the Dark Lord."

Sirius gave an exaggerated eye roll. "We'll file that under a future-me problem, alright?"

"Leave him," Zabini leaned back with a sigh. "He'll come round when he's horny enough."

Sirius flipped her off, glaring at the laughter the action earned.

Harry and Ceres had just managed to lift the floorboards up when Uncle Lucy found them. He seemed rather thrown off balance when he saw what they were doing.

"What the hell-" He began, but was cut off when Draco saw something.

"Look! It's a piece of paper!" He announced, trying to grab it. "Ugh.. My arm's too short."

"Let me try," Blaise said. Draco moved aside to let the taller boy have a go.

After a few moments Blaise sat back, looking displeased. "It's impossible, none of us are big enough."

Lucius recollected himself, smoothing his features. "Draco, tell me what you five are doing."

Aside from ripping the floor up like a bunch of barbarians, Lucius mentally added.

"The floor moans," Draco explained. "We wanted to see if it was a ghost or not."

"Or treasure- which there is!" Blaise added, waving his arm towards the floorboards, "I saw it!"

Pansy pouted, "We can't reach it though."

Suddenly her eyes lit up, turning to Lucius as she started to jump up and down like an excitable dog. "Oh! Oh! Mr. Malfoy has long arms!"

Blinking, Lucius bit the inside of his cheek as the kids started looking at him expectantly. They couldn't be serious.

"No," He said. "I'm not getting my robes dirty because you have overactive imaginations."

"But daddy," Draco whined. "I saw it! Surely you can-"

Shaking his head, Lucius gave his wand a wave, fixing the floor. Honestly, how had they broken it open in the first place?

Turning on his heels, he nodded towards the door, "Cake will be served soon, and I don't imagine Ceres wants his uncivilized cousins to get through it first."

Ceres jumped up quickly, gesturing for the others to follow. Cousin Ronnie would eat it all if you let him.

After everyone had eaten cake and Ceres had opened his presents, it was time for the parents to say goodbye to the kids sleeping over at the Prewetts.

Sirius hugged and kissed Harry unashamedly, holding him out at arms length as he asked for the hundredth time. "You sure you'll be fine?"

"Yes, daddy," Harry rolled his eyes. "It's just Aunt Tia and Uncle Iggy."

Nodding, Sirius place one final kiss to his forehead. "If you want to come home, just let them know, okay? I'll come right over and get you."

"I'm not a baby!" Harry exclaimed indignantly, huffing as his father ruffled his hair.

Turning to Ignatius, Sirius whispered, "You're sure you're fine to do it?"

Ignatius nodded, "Once before he goes to bed and once in the morning. I have this under control."

Nodding, Sirius gave his Uncle a hug and his Aunt a kiss, before heading towards the drawing room. He floo'd away, leaving his son to the Prewetts for the weekend.

Ceres is five :) and all the kiddies have a mystery to solve over their weekend at the Prewetts Manor. What could possibly be on that paper?

Will Sirius handle the separation okay? What about the other parents?

Let me know your guesses in the comments, like the story, but most importantly enjoy!