The Schengen visa allows you to stay in Switzerland for a maximum of 90 days. It is priced at € 60 for adults and € 35 for children between 6 and 12 years old. For children under 6 years old, it is free. You have all the information in: «Requirements and documents to travel to Switzerland: do you need a visa?«.
You have all the information in: "Requirements and documents to travel to Switzerland: do you need a visa?".