I think the longest time that the Little One can sit in her high chair is 10 mins. Then she wants to go and sit on her Papa's lap while having her meals and after a few minutes she would go and sit on mine.
But things have changed . . . she can sit still now during her entire meal, but NOT on her high chair . . .
But on our chair! She likes doing what grown-ups do.
And that is why we have this directory in the dining table . . .
Our improvised booster seat! Thank you Yellow Pages!
Goes without saying, resourcefulness is one trait we have developed, haha!