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

Think about a door. Closed? Door. Slightly open? Still door. All the way open? Still door. Looking at it from outside versus inside? Yep, still door. All other objects as they flip or shift are still the same object. Letters are a unique exception : p is not b is not d