The only criticism I have of Tapestry of Grace's schedule is that they only allow one week to study Ancient China and Ancient India. We stretched both of these units into two-weeks. China could have been stretched further to three weeks, but we decided to save something for the next time we tour this time period.
The kids spent two weeks just making their model of the Great Wall of China. Of course, it's just a sample of the wall, but it's still pretty big. It takes up almost the whole dining table and will soon have to live in the attic for awhile as we keep bumping into it!