Boo At The Zoo brings in a big crowd that would scare away last year's attendance numbers. More than 2,000 kids and their parents showed up in costume, from the scary to the silly for Old National Bank's annual safe Halloween event at Mesker Park Zoo. Kids got to do crafts, visit with the zoo's nocturnal animals, and of course, get a jump start on trick or treating. Tickets are $6 for zoo members and $8 for non zoo members. The fun continues Sunday and all next weekend.