Your child knows they're fast. Or at least that's what they claim after making you time them as they do laps around the living room... fifteen times.
There definitely is a certain appeal to having the power of super speed. You could out-run the bad guys, Catch fleeing villains, Get wherever you want to go in the blink of an eye. That's pretty sweet and not to mention, if you're like the classic DC hero, you've got the whole "speed force" thing with quick healing and crazy endurance.