The little girl just became a kindergartener and looks forward to going to school every day.

kindergartener 是由 kindergarten（幼儿园）加上后缀 -er 构成的名词，表示"幼儿园学生"。kindergarten 源自德语，由 kinder（儿童）和 garten（花园）组成，字面意思是"儿童的花园"。