Stiftung Zürcher Schulferien (ZSF)
Week-long overnight camps in Swiss holiday houses for kids from 2nd grade, each built around a theme, with fees that scale to family income.
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Holiday camps for city schoolkids, running since 1876. Each week-long overnight camp goes Monday to Saturday at one of the foundation's own houses in the Bernese Oberland, Ticino or western Switzerland, with a theme such as cooking, climbing, canoeing, tennis or caring for animals.
Groups of 20 to 48 kids from 2nd grade up travel with experienced leader teams. Fees scale with family income, and siblings get a discount.