Zoo New England on Aug. 2 will participate in the fifth annual Free Fun Fridays program sponsored by the Highland Street Foundation. The admission fee for the Franklin Park Zoo will be waived for all guests, giving visitors an opportunity to explore the zoo and enjoy featured shows. Free Fun Fridays is a program that includes 60 museums and cultural venues across Massachusetts. Each Friday this summer, six venues are open for free. The program runs through Aug. 30. For the full program schedule, visit www.highlandstreet.org. To learn more about the zoo, visit www.zoonewengland.org/FranklinParkZoo.