Zellers Discovery Zone. Don’t miss this year’s Boo at the Zoo running 10:00am to 4:00pm, October 24-25 and October 31. Check out some family-fun entertainment at the Halloween Harvest Stage. Find your way out of our NEW hair-raising hay maze, take part in our Critters and Costumes Parade at 12:00pm and 2:00pm to show off your Halloween disguise and back by popular demand – the Toronto Zoo Staff pumpkin carving contest! And if it’s treats you seek, you and your friends can drink from our infamous cauldron of Boo Brew or nibble on tasty treats from Hershey’s (while supplies last). Plus up to two kids in costume (12 and under) accompanied by an adult get in FREE (max 2 per adult). For more details, visit torontozoo.com.