I don't own Harry Potter, but I do own the OCs used in this drabble series!
1.) Muggleborns who miss their dogs get stuffed dog animals, then use Engorgio to make them bigger and animate them to play with them.
Ash Watkins, a Muggleborn wizard at Hogwarts, walked into the Muggle toy store with a mission. His eyes scanned the 'Stuffed Animal' section, looking for one that was perfect. His eyes landed on a Golden Retriever puppy stuffed animal. He gingerly lifted the toy up and inspected it. It looked perfect, from the honey-colored fur, to the floppy ears, waggy tail, and delicate paws. He went up to the cashier, who gave him a funny look. "I go to a boarding school and I don't get to see my dog until summer break. This looks just like him." He explained, handing over the cash and taking the stuffed dog.
"Have a nice day. I hope that dog keeps you company at your school." The cashier waved to the third-year Ravenclaw as he exited. He waved back and left.
He went into a back alley behind a Starbucks and lit a match, dropping it into one of the open dumpsters. Ash then pulled a small bag of green powder out of his back pocket and dropped a pinch into the flames, turning them green. "Ravenclaw common room." The blond whispered, stepping into the flame and closing the dumpster lid. He found himself in his desired location and ran up to his bed in the boys' dorm, enthralled with the idea he had come up with earlier.
The hazel-eyed boy sat himself down on the foot of his bed and pulled out his wand. "Why didn't I think of this sooner?" He asked himself, while casting Engorgio then animating the toy dog afterwards. Not long after, happy barking and laughter was heard in the Ravenclaw common room, as Ash taught tricks to (and played with) Brody, his Golden Retriever puppy.