Special to the Advance EDINBURG — The Museum of South Texas History presents Summer Nights showcasing the Rio Grande Valley from 7 p.m. to 9 p.m. July 11, July 18 and Aug. 1.The first night was on June 27. Each night will focus on a different Rio Grande Valley county through family-friendly activities and puppet shows. Upon entrance, each child will receive a Traveler’s Guide to take on their journey through the Rio Grande Legacy exhibition, which will feature handson activities.Those who complete an activity can collect a stamp. If seven or more stamps are collected, the participant will receive ...