High valley between Morro de Cuber and Es Tossals, with its famous airplane-wreck. If your kids are not motivated to go to the montain, you can always say: "Do you want to see a crashed airplane?"
Note the kind of grass - "carritx" in mallorquin language- which is not very nice at all, but very common in the Majorcan mountains. You can easily cut your hand if you use it for support when climbing. It often covers stones and uneven ground, so it might sometimes be tricky to know where to place the foot at each step.