There are plenty of biking trails around Gstaad. This day, we opted for an easy relatively short tour along the river starting from Saanen passing by Gstaad and till Moosfang. It’s an easy flat ride mostly through the forest and / or in low-traffic roads. It’s perfect for young kids. Stop visit both Saanen and Gstaad; they are an absolute beauty.
https://goo.gl/maps/5AUfeuCVdaz2FA6SA
https://www.gstaad.ch/en/summer/bike/mountainbike-routes.html