The Hogwarts Express Let off a loud whistle, and started chuffing into the distance. James Potter, Remus Lupin, and Peter Pettigrew were all looking at their friend Sirius Black, half amused, and half annoyed. Seconds ago, he had announced that he had come across a grand pranking device while he was at home. He was now rummaging through his trunk to greet to it, and was throwing its contents all over the train compartment rather haphazardly. "Watch it, pad foot" James said as an old sock hit him in the face. "ugh, it smells like you haven't washed it in weeks"
Sirius ignored it, and continued to search for the item.
"Found it!" he said triumphantly, and turned around to show his friends the item he had discovered.

Needless to say, the marauders were disappointed. They had expected some grand and fabulous pranking device, a huge supply of dung bombs, or something to match the marauders map, or maybe the invisibility cloak. They did not expect to see a small faded gold necklace
"What it supposed to do?" asked Peter.
"It's a time turner, you idiots" Sirius replied excitedly.
The mood was instantly transformed, as they all marvelled at the small necklace.
"Think of all the new pranks we can pull now" James said excitedly, his mind wandering from thoughts of Lily Evans for the first time in days, and straying to new possibilities.
"The slytherins will never know what hit them" Sirius chuckled quietly to himself, lost in his own daydream of the look on Severus Snape's face when he became victim to the prank of the century.
"And the best part" James exclaimed snapping back to reality "They won't have any proof that we did it, because we'll have alibis! AND we can be in two places at once! HA! This is revolutionary!"
"Are you sure it's safe?" Remus asked carefully. He had put his book aside, and was now examining the time turner. "I mean, you don't know if it works, we could be sent way back into the past – or way forwards into the future. I mean you did find it in your parents' bedroom, and there's no saying how reliable it is..."
However, Remus' words were drowned out by James and Sirius' brainstorming new ideas.
"I say we give him a potion that makes him confess his undying love for McGonagall..."
"I say we get detention, then when we're out, use the time turner, go back, and curse him into oblivion in front of his eyes! Old snivelly will SAY it's us, but – "
"But we'll be in detention right under McGonagall's nose, so there'll be no WAY she'll blame us! She'll think he's trying to get us expelled!"
"GENIUS!" The boys cried together. Remus just rolled his eyes and sighed, though his lips were curved into a faint smile.
"You in, moony? Wormtail? Remember, it'll only work if all four of us get detention, so there'll be no way Snivellus can – "
"WHAT will only work if the four of you prats get detention?"
The four marauders snapped their heads in the direction of the compartment door, only to see Lily Evans leaning in the doorway, one eyebrow raised, accompanied by no other than -
"Snivellus" Sirius muttered viciously under his breath, glaring at the skinny, greasy haired, hooked nosed boy standing in the doorway.
"Whatever you're plotting, forget it, because I'm reporting you" Lily snarled, placing her hands on her hips and narrowing her eyes.
James broke out into a charming grin. "Evans! How nice of you to say hello. How about you drop the company of slytherin scum and – "
"Pettigrew, what's that? "Lily interrupted James 'rant (he looked rather disappointed) she was now scowling in the direction of the time turner, which Peter was holding in his hand.
"Ah – um, nothing!" Peter gave a nervous and unconvincing grin while trying to hide it behind his back.
Snape was too quick for him. He raised his wand, pointed it at the time turner and said "ACCIO!" Sirius and James watched in horror as the time turner went whizzing across the room and neatly landed in Snape's hand.
Sirius and James let out howls of rage, and jumped on Snape to retrieve the time turner. Snape was overcome by the weight and fell to the ground, his wand falling out of his right hand, but still firmly grasping the time turner in the other.
"GIVE IT HERE YOU NOSY PRAT!"Sirius yelled, reaching over the floored Snape to get to his hand. He was kicked in the face by Snape's foot, and fell back, clutching his now bleeding nose. Furiously, James got to his feet and pointed his want at Snape.
"INCARCEROUS!" He yelled at the wandless Snape, who desperately thrust the time turner in front of himself to deflect the curse.
The room starting spinning, everyone's visions went blurry.