Great job!

I wasn't going to review until I read all of these fantastic chapters... but I have to say... this chapter nearly brought a tear to my eye. Beautifully written xx

"You know, if I weren't so invested in making the world a better place, I think I would be the best super-villain there ever was. The world's a mess, and it would be better if I just rule it."

Was this an intentional Dr. Horrible Sing-Along-Blog moment? :)

D'awww That was adorable! And petulant chibi Tony was so cute, omigod. Why was Tony so against Pepper finding out he was de-aged, besides the kawaii effect? Thanks for the wonderful fic. Favorite quotes:

"What're ya doing?" Steve asked, sauntering into Tony's garage. Garage. That was like calling the Empire State building a shack. It was more of a mad scientist's laboratory crossed with a mechanic's yard. But Tony always said 'the garage,' so that's what it was.

…

"You mentioned something—"

"There were stock issues with Stark International; I had to buy some back. Sell some. And then Fury was pissed about the incident in Caalifornia and he needed facts double-checked. Thor was…" Tony shook his head. "You know what. Not important. There were issues with the labeling company that I bought and some of the legislative issues in Congress were…not what I wanted. It's all sorted."

"You just have to have a piece of everything, don't you."

"You know, if I weren't so invested in making the world a better place, I think I would be the best super-villain there ever was. The world's a mess, and it would be better if I just rule it."

Rolling his eyes, Steve reached out and tweaked Tony's ear. "You'd be a terrible villain and you know it. You'd be obsessed with your villain costume. Now. Shower like you threatened, and let's go for dinner. Maybe then I'll give you your anniversary gift. If I decide you're worth it."

Tony grinned. "Right. One more email to StarkTech, and then I'll be right up."

Shaking his head with fondness, Steve wandered back upstairs to change and wait. He could always strip and walk around upstairs. Jarvis always sent pings down to Tony (who thought Steve was unaware) to notify him when he was nude.

…

"Oh my God. Tony. You're adorable!" Reaching out slowly, Steve petted the round cheeks and touched dusty blonde hair. "You were a blonde as a kid?"

Flushing more, Tony batted his hands away. "Get me out."

Steve obliged and pulled him from the suit, holding him out in front of him with a sort of awe. "Oh my gosh. Look at your pouty lips!"

"Yes, yes. We all know how strong you are. Now put me down!" he snapped, the child-voice higher and softer. "Damn, this sucks!"

Steve sat on a bench and tucked Tony into his lap. "Tony! You were—are—such an adorable child."

…

Humming in agreement, Tony topped off Steve's lap and ran a finger through is hair in a gesture so Tony that Steve wanted him full-size so he could push him up against the nearest wall. Or grab him up to his chest and cuddle him in a way that Tony never let him when he could wriggle his way out of it. "Well. May as well break the news."

The Avengers all leapt to their feet and scrambled for their masks, someone screeching, "Oh my God! Is that your kid?"

Steve blinked, sent an appalled look at Tony and then shook his head frantically, the words unable to come out of his mouth suddenly.

Tony let his hands drag down his face as he groaned. "Jesus. You're all insufferably dense…"

Interestingly, it was Peter, Spider-Man mask haphazardly over his face as he actually stood on the floor for once who got it. "Tony!" And gaped, his chin hanging out of the bottom.

Tony put on his best people-pleaser grin (made heart-melting child-size), arms spread wide. "Surprise!"

…

"Oh honestly… This is ridiculous…"

"Mom and Dad fighting…" Peter muttered.

"Shut it!"

"Hm. Yeah, that's awkward. Now that it looks like Dad and Son."

"Peter," Tony snapped. "Not. Helping."

He grinned in response. "Ooh, what will Pepper say? She ever seen you as a kid?"

Tony unexpectedly turned pale. "Shit." Then looked at Steve. "We are not done with this conversation. Rework the roster, whatever, but this does not get back to Pepper." He looked around the room. "Do you all understand. I'll be in my workshop. Just tell her I'm unavailable. And at all costs, donot let her down there? Am I clear?"

Most of the members nodded, Clint, Natasha, and Peter smirking and giggling.

"I will do terrible things to you if you tell her," he threatened, looking, again, adorable. And then fled downstairs.

Steve sighed. "Hopefully, that will keep him busy until we can get him back to normal. And keep him off the field." People nodded around the room, wincing as a horrible racket of opera filled the house. "To-nyyyyy!" Steve bellowed and stalked downstairs to bang on the -locked- workroom doors.

…

His mind was already so far ahead of everyone else that he didn't need to get flustered. He didn't need to freak out. His brain skipped right over that and had already begun working on three different plans to get himself out of his current mess. So Tony doesn't need to bother with the minor concerns of normal people. He just needs to kick his brain into gear and machinate a way out for himself.

So when Tony Stark looses control, it's either a calculated outlet, or it's a very bad sign.

This time, since they've no audience, Steve is going to take a wild guess and propose that it's a verybadsign.

…

"Just…" Air gusts out his nose and he risks a look at Steve, his eyes haunted-looking before he shakes his head and rolls his eyes. "Never mind."

"Tony," Steve says firmly, "you can't just yell at me like that and then expect me to believe you and accept you saying it's nothing."

"I didn't say it's nothing."

"'Never mind' in Tony speak is like saying 'it's nothing.' Which is never nothing!" He glares, feeling a little foolish as he realises his hands are on his hips. He feels mortified when he realises he probably looks like his mother. It does, however, wring a semi-amused grin out of Tony.

"You speak my language now."

"Oh come on. It's not like we haven't worked together for long enough that I know when you say, 'I have work to do' really means that you want to be alone with your machines because you're too wrung out with people to deal with them anymore. And I know when you say, 'I'm not hungry' you really probably are, but it means you want to continue with your work, uninterrupted, but you appreciate the effort people go through to make you take care of yourself. Tony, I know you."

This is made of pure win XD Luuuuuurrrrrve de-aged Tony

Oh my FUCK. MUUUCHHH FLUFFF. FUUUU TOO CUTE AT THE LAST PART. QAQ THANK YOU SOO FILLING IN DEERATE INNER OBSESSION FOR THIS

This really should have been a oneshot. It has the perfect setup for a oneshot with a good, solid ending that really /felt/ like an ending. And then you get to the second chapter and it kind of feels like you're reading a different story. My advice: keep the first chapter as a oneshot and have the later chapters be a whole new story.

had to look for more tony/steve stories in your profile :D so happy i found this too 3

I'll just go ahead and love you, if that's okay. This is the sweetest thing ever; you have the dialogue down wonderfully, Tony's insecurities and his outward persona almost heartbreakingly well, and I just love it.

Awww I loved this story and how adorable child Tony was!

Woah will there be more of this? It better will. XD

This fic is perfect! Keep up the gd work and write more please

ooowww~~Sooo cool is there more?

Great chapter. Emotional and cute ending.

"Promise" I lied. Wow that was pretty heavy, but I liked it.