GGG, glad that your LO has such a good teachers, it is really nice to shared the bk he wrote and read it to the class!!
Hope your LO can find his own way of entertaining himself during the academic time :P
I have tried to let my son attend play-base preschool, and the problem is he doesn't enjoy it as he doesn't enjoy the toys there (blocks, train, simple puzzles), he just ignored the toys and do the very simple arts. When other kids do each art once, he does the same art again and again for more than 6 times! =_=
As I have brought him to different preschool, i find that he likes sth more challenging. (E.g. arts that need more steps and skills like cut and paste) So i finally give up play-base preschool.