Tony is a man of science and hates when there are things he doesn't understand he examines,tests,and observe till he gets his answers. It has always been a trait of his and most would say it's a great trait to have. Not for Tony though, being so reckless with his life. After a long battle Tony gets his hand on some alien technology and ends up being de-aged to a five year old. Tony has no memory and can't remember the Avengers. The Avengers learn something new about their teammate that no one has known. (Lots of angst but their fluff and cute in between)