Why do kids write some numbers and letters in mirror image?

Question

I’ve been practicing the ABCs and 123s with my son and notice that certain letters (J N P S Z) and numbers (4 6) he always writes backwards/mirror imaged. I’ve seen other kids, and even my own writings as a child, have the same quirk. Is this pretty much universal?

In: 1018

Answer 1

I thought it was normal.
Just when they’re learning rhe alphabet and numbers.
At some point not too long after they learn to do it the right way around.
I remember it happened for me, and all my lil siblings.