Sketch drawn by  xbc9 You can find the original here: https://www.furaffinity.net/view/48715667/

Licking her ice cream cone, Tiffany strolled down the street towards the playground. She didn't fear going anywhere now that Frau Hildegarde had taught her the incantation for changing things into frogs. If anybody tried to bother her, just a few magic words and trouble went hopping off to look for a pond. She could go wherever she wanted. Today, she wanted to go to the playground.
To a child, a playground is a utiopia of plastic and plexiglass, a city of technicolor skyscrapers just waiting to be climbed, connected by bridges and swinging bars, with slides as rewards at the end of every path. But today, there were trolls under the bridge. Three boys, older than Tiffany by a couple of years, sat talking with each other in the shade. A blond one with a red shirt and a mean look in his eye, a dark-haired one in overalls, always agreeing with the first, and a watery-eyed ginger with a forced smile. Tiffany took no notice of them until they decided to take notice of her.
"Hey, no girls allowed!" said the blond one.
Tiffany stopped and stared at them. No girls allowed? What a silly rule. She waited calmly as they got up to confront her.
"Didn't you hear him?" said Overalls. "No girls allowed. You gotta leave."
"But I play here all the time," said Tiffany.
"Well, today we're in charge," said Blondie. "And we say girls aren't allowed to play here. Now get lost."
Tiffany frowned. She didn't like how uncomfortably close he was, or the way he kept leaning in towards her. He was bigger than her and it made her feel small. Yet, she wouldn't back down. She had no reason to be afraid.
"The playground is for everyone," she said, "and I'm going to play here today. You should go away."
"Oh, yeah?" said Blondie, taking another aggressive step forward. "Are you gonna make me?"
Overalls snickered, while Ginger gave an uncomfortable, forced chuckle.
"Yes," Tiffany said confidently, stopping the boys laughter.
Blondie punched his fist into his other open palm. "Really? And how are you going to do that?"
Ginger tugged at Blondie's sleeve. "Tom, maybe we shouldn't-"
Blondie slapped the other boys hand away. "Well, girl? How are you gonna make me leave?"
Tiffany smirked. "Like this," and began the incantation.
"Alverix Orcus Transfrogamorphus."
Overalls snickered again as Ginger backed away. Blondie cocked an eyebrow as he listened. The words were nonsense, but they had a strange sound to them. He had to hear them.
"Bufos Bofus," the chant continued.
The words enraptured him. He had to listen, had to understand. They were telling him something.
Pointing her finger at the head bully, Tiffany finished the incantation: "Ranadaeprophus!"
A flash of purple lightning leaped from Tiffany's finger and struck Blondie. With a strangled cry, he shriveled, his clothes disintegrating into smoke as his skin turned green and his hair receded. The other two boys screamed in terror as their leader vanished before their eyes, leaving behind a tiny frog.
Tiffany leaned over the new frog with a malicious smile. "So, are girls allowed on the playground?" she asked.
The frog croaked.
"That's what I thought."
She turned to the other two, who were trying to sneak away.
"Hey, you!"
They winced, then turned around slowly, trembling.
"Girls can play wherever they want," said Overalls. "There's no rule against girls."
"Please don't hurt us," begged Ginger.
"What are your names?"
The two boys shared a nervous glance.
"I'm Daniel," said Overalls.
"I'm Sean," said Ginger. "Please don't turn us into frogs. We were just playing around."
Tiffany smiled an unsettlingly sweet smile. "I like to play. Do you want to be my friends?"
Again, the two boys glanced at each other. Being friends sounded like a better deal than being frogs.
"Yeah," said Sean. "We'll be your friends."
"Right," added Daniel. "Let's have fun."
Tiffany giggled. "I knew you would. Can you push me on the swing?"
A short time later, two boys were pushing a young girl on a the swing, while a miserable frog sat off in the grass and watched, unnoticed by anyone.
When adults passed by, they thought, "Oh, how sweet. Those boys are playing so nicely with that little girl."

---

An hour later, Frau Hildegarde came to find her. From her vantage point at the top of the playground tower, Tiffany saw the stern glare on her tutor's face and knew trouble was brewing. Hands clasped penitently behind her back, she climbed off the playground equipment and shuffled over.
"You're late for your lessons, Tiffany," Frau Hildegard said. Her voice had the low growl of a cat about to pounce.
"I'm sorry, Frau Hildegarde," she replied. "I was just playing with some friends."
Frau Hidegarde looked in the direction Tiffany indicated. The two boys waved back uncertainly. They saw Tiffany's subdued posture and at an instinctive level sensed danger. If Tiffany was magical, but she was afraid of the old woman, the old woman must be even more magical.
The old woman sniffed. "These are your friends?" she asked, disgusted.
"Yes, Frau Hildegarde."
"However did you make friends with this sort of people?"
"Well," said Tiffany, drawing shapes in the wood chips with her toe, "after I turned a bully into a frog, they said they wanted to be my friends."
Tiffany saw the change in Frau Hildegarde's expression and realized the trouble had just been doubled.
"It's okay. They're really nice boys."
With an annoyed tsk, Frau Hildegarde glanced around, looking for any sign that someone might be watching. Seeing none, she began twirling her finger. From the outside, nothing changed, except that the playground suddenly became the least interesting thing in the world to look at, so boring that any passersby felt compelled to continue passing by without noticing it. From the inside, Tiffany and the two boys saw a wall of thick, grey fog formed to encircle the playground.
"What are you doing?" Tiffany asked, panic rising.
"Making sure nobody sees me change these two boys into cockroaches."
"WHAT?" shouted Sean and Daniel in unison.
"NO!" Tiffany shouted, full of despair.
The two boys leapt off the playground equipment and tried to run, but smacked headfirst into the fog wall, bouncing back as if it were solid. Frau Hildegarde strolled up to them, twiddling her fingers in preparation for casting. The two boys huddled together, staring up at her with tears in their eyes, too scared to speak.
"Please," begged Tiffany. "You can't turn them into bugs!"
"Would you prefer something else?" she asked, callous and implacable. "Mice perhaps? Or lizards?"
"Please!" Tiffany tugged at Frau Hildegarde's dress. "They're my friends."
Frau Hildegarde slapped Tiffany's hands away, glaring at the girl. "They're witnesses, Tiffany. When people start asking where that other boy went, the first thing they'll do is come to these boys for answers."
"W-we won't tell anyone," stammered Daniel.
"Yeah," added Sean. "It'll be a secret."
"You'll talk. Adults have ways of getting answers from children. Even if they don't believe the boys, it'll still draw attention to us. We can't have people knowing you were involved."
Frau Hildegarde pointed at the two boys and her finger started to glow. Daniel and Sean trembled as they felt a tingling sensation begin to spread through their bodies.
"What if we turned the other boy back instead?" Tiffany said.
For a moment, Hildegarde hesitated. Sensing an opportunity, Tiffany pressed on.
"Then nobody disappears, so nobody will come looking, right? You won't have to turn my friends into anything!"
Again, Frau Hildegarde tsked. She knew the boys weren't really her friends; they were just afraid of suffering the same fate as the bully. Tiffany was simply too naive to understand this. She wanted to disabuse her of this idea now - she did not approve of Tiffany spending time with low-class riff-raff - but the girl had a point. She was already using an inordinate amount of magic keeping people from looking into the disappearance of Tiffany's parents. If three boys suddenly went missing, even she would have trouble keeping things under wraps. She could always wait and dispose of the boys later, after people had become accustomed to the absence of Tiffany's parents.
"Very well," said Frau Hildegarde. "I'll turn the other boy back instead." Glaring at the boys, she barked, "Fetch him!"
Stumbling over each other, they rushed off to grab the frog still squatting in the grass.
"Thank you, Frau Hildegarde," Tiffany said, relieved.
"Take this lesson to heart, Tiffany," the old woman said sharply. "Every time you change someone, others begin to wonder where that person went. Never transform anyone unless you are sure there are no witnesses to tell what they've seen."
Though the words were meant primarily for Tiffany, Sean and Daniel also heard them and understood their meaning. Tiffany wasn't forbidden from turning people into frogs, she just wasn't allowed to let anyone know she could. Daniel understood this as he'd understood most rules in life, "It's fine as long as you don't get caught." Sean, the smarter of the two, realized he'd now fallen under the attention of people far worse than Tom. Tom might punch them if he got mad, but that was as far is it went. If Tiffany or Frau Hildegarde got mad, he'd spend the rest of his life living in a pond somewhere.
"Is this the boy?" Frau Hildegarde asked.
"Yes, Miss," said Daniel, putting Tom down.
"Frau," Hildegarde corrected him. "You will call me Frau Hildegarde."
"Yes, Frau Hildegarde," Sean and Daniel said obediently.
"Good. Now . . ."
With a quick gesture of her finger, Frau Hildegarde turned the frog back into a boy. Tom patted himself down, relieved to no longer be small and slimy. Then a cold sensation washed over all three boys as Frau Hildegarde waved her hands again.
"You boys are lucky," she said. "It makes no difference to me if you're boys or frogs, but I don't need any trouble with the police. So, you'd better make sure you tell no one what happened here. To make sure you don't, I've placed a spell on you all. If you ever do reveal us, then the next morning you'll wake up as cockroaches and nobody will ever know what happened to you. Is that understood?"
All three boys nodded.
"Good. Come Tiffany."
Frau Hildegarde took Tiffany by the hand and led her off the playground. As the wall of mist dissipated, Tiffany looked back to her two new friends and waved goodbye. Daniel and Sean waved back, but with somewhat more trepidation. Tom, realizing he'd been replaced as top bully, slunk off to contemplate the unfairness of life. He'd be avoiding Tiffany from now on.
Sean and Daniel, on the other hand, had made a new friend and this was one they intended to stick with. Better to be friends, than be frogs.