Ligonier Valley High School freshman Alex Marsh watches closely as a Colombian red tail boa that he's holding, and later purchased, snakes upward at a booth occupied by Rick Krumrine of Biglerville, who specializes in captive bred reptiles. Marsh is attending Sunday's Reptile Show and Sale at the Harmer House in Cheswick with his mother and sister, Sharon and Emily Marsh. Alex and his sister are out all summer long exploring, learning and bringing animals home, his mother Sharon said. 'I have a one day rule, they can keep it for one day and then if it's healthy must be returned to the wild,' she said.