Pundit,
That's interesting. Chances are you will figure it out better if you can recall yourself at those ages.
At 2 is when I can definitively say I remember anything. I recall visiting a convent(I didn't know then what it was). The pews and the smell of wood.
The toilet seat. Big and scary. That is the furthest I can dig from my memories.
At 3 I recall seeing KICC from the car. The smell of peremende(tamtam) in a muhindis duka. Looking up at the full moon with awe. Hating the site of avocado. Being fascinated beyond imagination by a guitar playing neighbor. A warm glass of milk in bed.
At 4, I could look at picture stories. The words simply faded into obscurity. Never made sense of them. I was never ever going to get past the pictures. Climbing trees was heaven.
The first things I was ever taught were about religion. The pictures in the Bible stories were captivating.
I only start making out letters at 5 in Nusery school. But the swings and the stationary old convertible with no windows are far more interesting than A, B, C.
You obviously have your own memories at those ages. If you dig into them, they might just give you insights. Especially if you see traces of yourself in the child.