When children have trouble vocalizing a vowel sound, the word doesn't come out right. There is no recognition. The child keeps saying sounds but they don't recognize the word they are *almost* saying.

The short O sound is tricky for many.

Here's a great tip to help with that!

It's always good to have a word associated with a letter to jog the memory. For O we use "olive".
A sliced olive looks exactly like that letter O! To make that sound you have to form your mouth into the shape of an O and an olive. Open nice and wide and say Ahhhh.

Ahhhhhh olive. Ahhhhhhhh olive

Taking the time to make sure the sound is perfect. Practice, practice, practice. Sounding out words is more fun when they actually sound like a word you know!