I'll start with my INTJ brother's, because his are more amusing:
- He had a "celebrity brain collection" on display in a glass case in his room. The "brains" were large wads of cotton sitting in water-filled trays that were labeled with the names of famous people, most of them politicians.
- Yelling "stop this juvenile foolishness!" at other kids during recess
- When another kid called him a nerd, he replied "if I'm a nerd, it must be a wonderful thing to be".
- This sounds more ENxP-ish, but he would change into a neon orange nylon suit, with the hood pulled so far forward it gave him 'Shelley DuVall ears', and would insist that his name was "Daniel Zini".
some of mine:
- I really wish I had the picture of me as a baby where I'm lying down on my stomach on a newspaper, "reading". though I guess newspapers aren't stereotypical INFP reading material.
- My cousin and I were playing with stuffed animals, and whenever she wanted the one I had, I would immediately hand it over. My grandmother told me I didn't have to keep giving my toys away, to which I replied "But I will share". (Could sound more Fe than Fi.)
- My family went to see the movie Beethoven, and I started bawling when the vet says "the dog has been destroyed".
- When I played with my stuffed animals, it usually involved trying to heal or comfort them.
- This one isn't that INFP-ish, but it's creepy enough to share: my favorite and longest-term imaginary friend was a bed-ridden, toothless old lady named Granny. I "fed" her mush and talked to her everyday (thankfully bed pans and bathing were left out). When I got tired of her, I found a way to get her to go away without admitting she wasn't real: I conveniently forgot to feed her and she died. (I was still innocent enough not to realize this happens in real life).
- My naive socialist-utopian idealism at age 7 or 8: "Why do we need money? Why can't people just give each other stuff?"
- Getting my leg pinned under two junior-league football players long after all the other girls around me had scattered because they had actually been watching the game instead of mentally teleporting to Planet Unicorn like I was.
- Actually studying the paintings during an art gallery visit, while my two ESxP cousins were running around playing tag.
- my 4th grade teacher told me I'm the messiest girl in the class.
- Writing a slightly surrealistic poem about a girl named Roberta who can converse with the sun
- Noticing that The Lion King has a similar plot to Hamlet, because I'd been reading about Shakespeare in the encyclopedia