Jul 19, 2018 - 11:22 PM
It would be helpful to know any particular route you are thinking of travelling on - the journey would need to be more than a short hop to make it worthwhile using the family area.
The PDFs of the official Swiss timetable clearly show trains with family play areas, the letters 'FA' indicate a coach with this is included in the train.
Example PDF from the Bern - Olten line:
www.fahrplanfelder.ch/ fileadmin/fap_pdf_fiel ds/2018/450.pdf