Valdisotto is a fantastic family destination. Go hiking on the trails around Monte Vallecetta and San Colombano in the summer or hit the ski slopes in the winter.
For an easy activity suitable for all ages, explore the Paluaccio Nature Reserve and its unique wetland ecosystem. Not far away you can find the Venini Fort at Oga, a military fortress built in the early twentieth century (and temporarily closed for restoration). If it's hiking trails you're after, from the cable car station at Bormio 3000 follow the signs to the Bei Laghetti and Profa lakes, or head up through the pine forest from Oga to San Colombano. In winter, enjoy a family ski holiday in the Cima Piazzi-San Colombano ski area.