Space was used for various purposes in accordance with various education and classes. It is a folding door that cannot be left out when space is utilized. If the folding door, which is fully fixed up and down, is opened to separate the space, there is no movement, and there is a locking device between the door and the door. If the locking device is locked, it does not move in the impact, and is firmly fixed, so there is no injury to many moving infants.

Glass was chosen as mist glass, which has a translucent effect. In the case of mist glass, one side is mist-treated, translucent, and the other side is transparent. Therefore, it protects privacy with a sense of privacy and reduces frustration and openness by penetrating external light with proper transparency.​

The type of glass for the folding door is transparent glass / aqua glass / anvil glass / anvil glass / a bronze glass / a high-heeled glass, and in addition to glass / acrylic. The thickness of the normal folding door is 5 to 24 mm / the insulation folding door is 22 to 32 mm.

Opening all the folding doors with 90% or more openness allows you to expand the space to the point where you wonder when you've separated the space. Therefore, the two classes can gather in one place and conduct education together, and they can have a fun time together.

While expanding and separating space, space utilization has increased, but if you close all windows and stay indoors for a long time, the air feels stuffy or heavy. After snack or meal times, indoor air circulates more quickly to open and close outside in a space full of food odors, enabling rapid ventilation.