The children in the kindergarten(幼儿园) are usually three to five years old. In class, they are taught numbers and colors; they begin, to study something about their bodies and their families; they listen to interesting stories; they learn about plants, animals and so on. In a word, the children begin to learn how to learn. Their studies in the kindergarten make them ready for the further learning in primary schools. People celebrate Kindergarten Day (April 21) for Friedrich Froebel, a German educator (教育家), who was born on April 21, 1782 and who started the first Kindergarten in Germany in 1837. He chose the German name "kindergarten" meaning garden of children because he wanted the children in his school to grow as freely and healthily as flowers in a garden. Froebel understood anti respected the nature of young children and believed that they learned best through activities. In addition, he designed special play materials and believed that actions such as singing songs would do good to the children. In the mid-nineteenth century his ideas were brought to North America by German immigrants (移民) who set up kindergartens for their children. The first public American kindergarten was opened in 1873 in St. Louis. what did Friedrich Froebel pay more attention to
A. The classroom of the kindergarten. B. The food in the kindergarten. C. The role of activities.