#zero impulse control

Me, two weeks later:

See, speedsters are able to control what age they are and, while only Bart and Jay have ever seriously messed around with that ability, they need a wildcard move that won't be predictable.

What would a bunch of mind controlled superheroes not expect? What would immediately mark them as not a threat and allow them to sneak around in plain sight?

They disguise themselves as middle schoolers.

Jay and Barry get lucky. No one knew them as children and they aren't really recognizable as children so they get away with being 12.

Wally, Bart and Ace not so much. Half of the superhero community knew these three as children so they are forced to go even younger to be unrecognizable. All three settle on 6 because they refuse to compromise their ability to run.

The plan is to sneak into a class trip touring the Hall of Justice and then sneak away from the group to 'go to the bathroom'. The bathrooms are right above the Halls boiler room so then all they would have to do is vibrate through the floor and bam! They're through security undetected and have access to Hall.

What they don't take into consideration is that A) while Wally, Bart and Ace are used to being on high stakes missions as a child, Jay and Barry are not, Barry's on the verge of an anxiety attack and Jay CAN'T LIE B) as children none of them had the same control over their speed or their focus, which becomes very apparent when all five of them get so wrapped up in a pokemon battle that they don't notice Wonder Woman taking over the tour and, most importantly, C) Wally couldn't vibrate through objects without blowing them up until he was an adult.