The American Red Cross will hold the Brookfield Zoo Chicago Summer Blood Drive on Thursday, June 19, 2025, from 9 a.m. until 3 p.m. Each day, the Red Cross must collect more than 12,500 blood donations to meet the needs of patients at approximately 2,500 hospitals across the country and we’re sensitive that the decline in blood donations during the summer may impact the blood supply. All pre-registered blood donors will receive: free general zoo admission the day of the drive for one adult and up to two children; free parking in the Discovery Center Parking Lot; a special edition Red Cross T-shirt. The Brookfield Zoo Discovery Center is located at 3300 Golf Road, Brookfield, IL.