In Denmark there is a tradition for taking school children to school camps. The Danish Wadden Sea area would fit for such a purpose. Businesses are cooperating with each other and the Wadden Sea National park to make offers available. Remember content may be translated directly to your language in your browser.
Know more: Mitvadehav (My Wadden Sea) Tasks, courses, knowledge bank and activities for children and others. https://www.mitvadehav.dk/