I'm on a mission to collect as many unique items as I can. Why? I can't say, but probably some bizarre form of OCD.
Anyway, in this hunt, using the lists provided at The Vault, there is the Vault 101 Children's Jumpsuit. How can I collect this as an adult player, seeing as it goes away after you turn into a teenager, and there don't seem to be any kids in Vault 101 upon your return?
Note: I'm on an XBox 360, so anything involving the console won't work for me. However, for the sake of completeness, whoever gets here first with the console commands to do it for PC users, go for it. I just won't upvote (but I'm sure others will).
Best Answer
According to The Vault, the jumpsuit is only accessible as a child, unless certain console cheats are used. (There were actually two different pages for the same item.)
Also, there is a great FAQ available over at GameFAQs, detailing the method to get each unique item, including those only availble trough glitches (and it is even for the Xbox360)
Now, for those wanting the jumpsuit anyways, on a console enabled version, you can simply type
player.additem 340F2 1in the console