Breakfast???

I need help!

My boy is turning 11 next month.
Suddenly, he doesn't eat breakfast.
He says he's not hungry.  Nothing sounds good.
We homeschool, so he doesn't need to eat rught away.
I'm thinking some sort of high nutrition "snack" or "shake".
I offered my homemade granola bars, but  he really isn't interested in eating.

????

Ideally, I'd find something not too high in sugars.  Mainly natual if possible.  Not to expensive per serving. 

Here's some internet options....















Any opinions?  Ideas???