Author's Note: This prompt was requested by caitlwnsnow! Here's the second prompt I promised. I will work on writing more this week when I'm not working on my other stories!

Aiming her palms right at Barry, Killer Frost tilted her head. "Is that all you've got, Flash?" She chuckled deviously. "I thought you had more in you."

Panting lightly, the Flash, shook his head. "It doesn't have to be this way."

The blonde laughed heartily. "Actually, it does." Without another word, she shoved her hands forward, sharp shards of ice flew towards the Flash.

Barry zipped away, dodging the incoming icicles as they were hurled in his direction. Moving around rapidly, he continued to dodge each incoming missile. "I'm faster than that." He taunted.

Killer Frost pressed her lips thinly together. She shot ice along the cement, watching as Barry slid against it and lost his balance. "Not fast enough it seems."

Cisco was watching from the intercom as the pair fought in Central City's park. "You can't try to outrun her, Barry."

He smirked. "Actually, I can." Barry began running circles around Killer Frost, just enough to gain momentum. As he came upon maximum speed, he thrust forward an arm, hurling a lightning bolt in Killer Frost's direction. He watched as her hands pressed forwards and they managed to freeze the lightning bolt right in place.

"That's new." Cisco said in Barry's ear, completely stunned.

Before the fight could progress any further, the villain and superhero began to shrink in size. Both of them bewildered, they stared blankly at each other and then at themselves. Suddenly, they were little kids again.

"Cisco?" Younger Barry asked.

Scowling at the Flash, Killer Frost peered daggers at him. "Now you die!" She thrust her hands forward but nothing happened. She tried again, nothing happened.

Barry peered at her and began chuckling. "Looks like you're the one who's lost, Frost." When he started to run, his powers failed to kick in.

"Uhhh.." Cisco looked on the monitor, seeing the fight in progress. "Guys. I think it's pretty pointless."

"Now get in the car." Cisco prompted Frost, his eyes begging. "Please!"

Barry fidgeted with his seat belt, sighing deeply. "Would you hurry up? The sooner we get to S.T.A.R. Labs the sooner we can fix this."

Killer Frost kept her arms crossed, her brow furrowed. "No," She was stubborn, sitting on a bench.

Cisco sighed and ran a hand down his face. "I can't believe this is happening. Why me?" He wondered.

After he tried pouting, Frost began to throw a tantrum. She threw herself on the ground, kicking and screaming. "I'm not going anywhere with you!"

Barry rolled his eyes, looking up to the ceiling of the vehicle.

"It's for your own good." Cisco said. "Don't you wanna be queen of all things evil again? 'Cause you can't when you're like this." He had no idea what had caused the pair to go back in time. It was a strange phenomenon. One he hoped Dr. Wells would help figure out.

After kicking and screaming for what Cisco recalled as forever, Killer Frost finally caved and sat up on the cement. She narrowed her eyes at Cisco. "Once I'm myself again, you're the first one on my list." She rose from the ground with a hmph!

Cisco inhaled sharply before returning to the vehicle and shut the door for the kids. After getting to the driver's seat, he plopped inside the car and ignited the engine. Oh boy, this was weird.

Harrison walked into the Cortex from the laboratory. "All their vitals are fine. I ran some standard tests and nothing has changed about them besides their age and the loss of their powers." He informed Cisco.

"Do you think this is the work of a meta?"

"We can't rule anything out."

"Magic? Time change? What is it?"

"I don't know yet."

Cisco huffed. He peered into the room where the hospital bed sat and watched as Barry taunted Frost.

"Na, na, na, na, na!" He stuck out his tongue. "Can't get me now, can ya?"

Frost kept that infamous scowl on her face as she sat there annoyed. "Soon enough."

"How long are they going to be stuck like this?" Cisco questioned.

Harrison glanced at the pair. "Until we can find a solution. Let's take some blood work."

"Uhm, Have you ever taken bloodwork from a five year old? I'm pretty sure they really kind of hate it." Cisco expressed.

"It's Barry and Killer Frost. They're only changed temporarily. Getting blood from them shouldn't be that hard."

"Touch me and I'll kill you." Frost stated, moving her arm away from Cisco.

Cisco shook his head. "You're normally like twenty-seven years old. You shouldn't be scared of a little blood work."

Barry whined at Harrison. "Do I have to?"

Cisco exchanged looks with Harrison as if to say 'I told you so'.

It took longer than the two men would've liked to get the children to give their blood. After analyzing the results, Harrison removed his glasses and peered at Cisco. "Their cells have mutated. However, some of the mutated cells are transitioning back to their normal structure. I imagine this is just a temporary problem. Give them twenty four hours."

Twenty-four hours? Cisco sighed loudly, throwing his arms up in frustration. "What are we supposed to do for twenty-four hours? How are we supposed to keep them occupied?"

Harrison turned to see little Barry examining the treadmill. "Well we can't keep them here."

"Where am I supposed to keep them?"

Harrison rose his eyebrows.

Children ran in circles and games buzzed loudly nearby. Cisco sat upon a small bench, his elbows upon the table top and his hands held his face. John's Jungle Gym was the only place in the city for kids to enjoy pizza and games. It was a typical pizza chain but offered small rides and many typical games which offered kids tickets for prizes. He groaned into his hands, inhaling sharply. Why me?

Little Barry ran up to the table with a stack of tickets. "More, more!" He laughed, prompting Cisco to groan once more.

"Where's Frost?" Cisco asked.

"She's up there." He pointed towards the slide area. Cisco could see through a bubble window that Killer Frost was guarding the top of the slide, not allowing the other kids to pass through.

"Great." Cisco rose from the table. He dug through his pocket and handed Barry a five dollar bill. "Knock yourself out." Barry ran off to exchange the dollar for coins.

Cisco walked over to the play area and peered up the slide. "Frost! You need to go down the slide and let the other kids play too." He scolded.

"No." She called back down the slide.

"Is that your daughter?" A woman with long dark hair asked Cisco.

The dark haired male spun to face the woman and shook his head, "My what?"

"Daughter?"

"No, I'm just her… babysitter." Cisco finished, trying to press a grin onto his face but failing miserably.

"Well you're not doing a very good job. She's been up there for nearly an hour."

Cisco bit his tongue, his frustration building from the situation. The jungle gym only had a couple of hours left and he wanted to wear the children out as much as he could have. "Let me just… hold on." He held an index finger up to the lady. Cisco peeked back into the slide. "Please, come down. I'll get you some ice cream or something." He tried to coax Killer Frost out.

"What kind of name is Frost anyway?" Cisco heard the mother whisper to a friend.

Finally, Killer Frost caved in and slid down the slide. "Hurry up." She scowled at Cisco, sneering at him.

After playing at the jungle gym, the kids were both ready to fall asleep for the night. Cisco sighed in relief, helping tuck the children into their temporary beds. He couldn't risk going home and leaving them alone so he walked back into the Cortex and got comfortable at the desk. "Today has been a long day and I don't get enough credit around here." He complained to Wells.

"Try and take it easy, Cisco. They'll be fine once the twenty-four hours is up."

At some point, Cisco had fallen asleep at the desk. He awoke to the sound of the kids fighting and running circles around the Cortex. "Please, please!" He stressed, blinking tiredly. "That's enough." He checked the clock. Just thirty minutes. I can make it through this.

"You know what? We're gonna do some coloring on the computer. Come here." He prompted both the children. Tapping on the keyboard, Cisco pulled up a program on the two computer screens which allowed the kids to fill in black and white pictures with a color picker.

Once each of the kids had settled, the dark haired male leaned back in his chair. The next half hour went by quicker than he'd hoped yet at the same time, not fast enough. Before he could blink, both the children next to him turned back into their adult forms. Cisco's eyes blinked widely, Wells had been right. "Nice to have you back." He greeted Barry.

Barry and Killer Frost examined themselves over and without another moment to spare, Killer Frost began throwing shards at Barry around the Cortex. Barry had no trouble dodging every incoming attack.

"Take it outside, you two!" Cisco pleaded, ducking behind the desk.