Monster by foolsdance (20k words)
Gen.
http://archiveofourown.org/works/937084
Following the disastrous events in Colorado, Sam and Dean encounter a new problem. An unknown creature changes Sam into his twelve year old self. Going from bad to worse, they are soon after caught by the FBI, who believe Sam has been kidnapped by Dean as a replacement for his missing brother. It's up to Sam to break Dean out of custody, not easy when you're suddenly a pint sized foster kid.

I love that story! I happened to stumble across it which made me write this post looking for more fics like that lol. Thanks!

Hello, your search reminded me of a story where after Sam comes back from the cage, he is deaged to an 18 year old with psychological problems due to flashbacks of the cage. I forget the name of the series, but when I get a response, I will pass the link on to you.

Yes please do! That sounds awesome!

If you find it, please post the link, I'd like to read that too.

Sounds like the Nostalgia Verse (http://nblaque-impala.livejournal.com/5322.html) by nblaque_impala.

Definitely seconding this rec. It's an amazingly good story. :)

Thanks for the rec guys, you're awesome :) xox

Sounds awesome, I'm definitely going to check it out!! Thanks for the link!

Yes it is the Nostalgia Verse I was looking for. Thanks for finding it for me!!!! The only problem with this verse is that it isn't long enough :P!!!! I wished she would write more. It is soooo good!!!!

Edited 2014-08-23 09:56 pm (UTC)

Hey! I am glad you found your fics but in your post you mentioned that you always happen to stumble upon stories where he is deaged as toddler but I can't find any :D:D and I would really like to read some :) Could I ask for some links? Thanks

I'm so sorry I'm replying so late! I can't think of any specific fic but just a simple search on ff.net for deage will give you tons! ;)