Of course, the bathroom should be divided into men and women, and children should know the difference between men and women. Kindergarten should have a restaurant for children to eat, which is more hygienic and convenient for centralized cleaning and disinfection.

You can let the children in the big class be on the third floor and the children in the small class be on the 1 floor. Of course, it doesn't matter if there are only three floors. It won't be inconvenient, just pay attention to safety.