Sasha Rogers, right, puts another large stick into place Saturday on a fort being built with brother Sigo, left, and friends Castine Ingram, foreground, and Gil Ingram, not shown, on top of Bradbury Mountain in Pownal. The four friends came to the park with their mothers, who liken their activity to that of birds returning to the same location every year to build a nest. Andree Kehn/Sun Journal Buy this Photo