What are some of your oldest memories Anon?
Do you even want to remember them? If you still hold visions in your mind from days old as decades, it must've been probably something rather intriguing or traumatising for your then child-like brain.
I do remember quite a few things - nearly all have some intense emotion assigned to them, kind of like a scaring experience to be forever remembered, although not every single one was purely negative.
It's funny to think about what exactly are those images in your brain - how they are stored and why synapses work like that.
ᵁᶰᶫᵉˢˢ ʸᵒᵘ ᵃʳᵉ ᵃᶠᶠᶫᶦᶜᵗᵉᵈ ʷᶦᵗʰ ᵃᵖʰᵃᶰᵗᵃˢᶦᵃ, ᵗʰᵉᶰ ᴵ'ᵐ ˢᵒʳʳʸ ᶠᵒʳ ᵇʳᶦᶰᵍᶦᶰᵍ ᵗʰᶦˢ ᵘᵖ⋅
It feels like something with a soul but in reality known to us, we are all just a jelly inside a calcium egzo-inter skeleton.

Oh, and I do remember some of my oldest dreams - the most aged that I can be sure of being a dream was, at the same time, probably my shortest one that I was able to save in my memory.
It took maybe fifteen seconds from my perspective and involved going through the sewers with some kids playing over a glowing slime that flew through the main channel, with sunlight coming through those basement-like little windows. I crossed a plank bridge and somehow opened those steel, vault doors, behind which was a scene from our few year old new place of living - a bedroom to be exact. There, in master bed, lied my mother and deceased father, half naked.
Soon after that I sneezed, that made my head explode, which woke me up.
I was maybe nine or eight when that happened but it's still clear like a day~

Bunch of vids chosen for your pleasure
https://youtu.be/nw5Z93Yt-UQ
https://youtu.be/BD6h-wDj7bw
ᶠᵃᵐᶦᶫʸ ᶠʳᶦᵉᶰᵈᶫʸ ᶜᶦᶰᵉᵐᵃᵗᶦᶜ ᵉˣᵖᵉʳᶦᵉᶰᶜᵉ
https://youtu.be/Zen_zRmbKaM