Hello tompagenet
No, a photo is not required.
Whether the Junior Card is the best ticket for your kids? Certainly.
However, if you as parents would purchase the Swiss Travel Pass or Swiss Half Fare Card, there is the complimentary Swiss Family Card offered together with these two products. The Swiss Family card is identical to the Junior Card. The latter is suitable if you travel with individual tickets (point-to-point ticket, Saver Day Pass) or regional travel passes such as the Berner Oberland Pass.
Kind regards,
Roland