Bring your little ghouls and goblins for a non-scary, kid-friendly Halloween experience. Children are encouraged to wear costumes. Children 12 and under will receive a treat bag upon exiting. Boo at the Zoo Nights is not a trick-or-treating experience. Nightly, October 17–30, 2017 *5:30 to 8:30 p.m. Admission $6 for Zoo members $7 for non-members Free for children under 2 $1 discount for children 2 to 12 in costume with on-site ticket purchase Purchase tickets here: estore.stlzoo.org/Events.aspx# Decorated Grounds and Festive Activities Animal Encounters Interactive Story Telling Food and Souvenirs and special guest apperances by Greater St. Louis Ghostbusters "How Do You Boo?" Instagram Contest Show us your spooky side by snapping a picture at Boo at the Zoo and sharing with us on Instagram. One lucky winner will win four tickets to our holiday lights event, U.S. Bank Wild Lights! To participate, share the pic on Instagram using the hashtag ##StlBooZoo. (Make sure your profile is public!) Upload the photo during your visit using our brand-new Wi-Fi powered by Mid America Chevy Dealers.