The minimal age for Key school is about 6 years, but most cantons give a free "kid's college" starting at age 4 or five.[172] Key college continues until eventually grade 4, 5-6, depending on the college. Traditionally, the initial international language in class was one of several other Swiss languages, https://swissmovementwatchonline.blogspot.com/2025/06/a-legacy-of-light-swiss-watches-for.html