Answer:
The child is normal
Explanation:
For most people, Our brain capability to recognize visual object will reach it's end stage of development by the time we're 8 years old.
This will make it really hard for a pre-schoolers (which probably around 4 years old) to differentiate one similar object from another. This explains why the preschooler wear the shoes in the wrong way. Nothing wrong with them, they just need more time to develop.