Unreasonable. According to relevant public information, what style to buy is a personal preference, and the requirements of the school are unreasonable. Kindergarten, formerly known as Kaner Garden, was introduced from Prussia hundreds of years ago. Its predecessor was Mongolian gardens and kindergartens. This is a preschool education school. According to the Regulations on Kindergarten Work, kindergartens are institutions that protect and educate preschool children over 3 years old, and kindergarten-age children are 3 to 6 years old.