Does not really relate to an ENTJ. I am an INTP, but as a kid, I was more ENT/FJ/P:
-In first grade, I defiantly did not want to watch Pocahontas, citing that we ought to see Michael Mann's 1995 film, "Heat," instead, and that Rated G films "sucked." I remember getting in trouble for that.
-In Kindergarten, I tried to direct plays with other kids my age. That went well...
-Throughout elementary, I had an affinity for building/designing things from legos, sand, and tree branches. I remember trying to make a Las Vegas Hotel with legos in 3rd grade, lol.
-I always took charge of a group and made sure everything went accordingly, even to a point of doing everybody's work and giving them credit because I did not trust them.
-Whenever I went on a swing-set, I would close my eyes and almost always visualize 10-20 years from that point looking back at that moment, citing that I should never forget it as I got older.
-I always aced math and english classes and my teachers were impressed with my vocabulary and obscure commentary.
-When we played basketball, I would tell my teammates actual "plays" I looked up.
-I played chess a lot.
I'm sure there's more, but remembering all this is starting to make me sad that it's gone.