Boo at the Zoo is a Halloween-themed event held at the Saint Louis Zoo and the Columbus Zoo and Aquarium. It is a non-scary celebration designed for kids and families of all ages to enjoy festive decorations, entertainers, special food and drink menus, and more. The event features various activities such as visiting the animals, checking out the turtles, tortoises, frogs, toads, snakes, lizards, and more at the Herpetarium, seeing a variety of creepy, crawly creatures at the Insectarium, and visiting the Caribbean Cove. Boo at the Zoo is not a trick-or-treating event. Admission fees vary depending on the date and membership status. The event is held on weekends in October, with different time slots available for each evening.