Find Waldo in 20 of 25 locations around Fourth Avenue and downtown, and be entered to win prizes. To play, pick up a passport and get it stamped in 20 locations where you find a hidden, six-inch-tall Waldo. Winners are picked on Wednesday, July 31. Passports are available at Antigone Books, 411 N. Fourth Ave.; The Children's Museum Tucson, 200 S. Sixth Ave.; the Joel D. Valdez Main Library, 101 N. Stone Ave.; and other places that Waldo may be found. Call 792-3715 for more information.