Ride-On Costumes for Aussie Kids — The Full Guide Ride-on costumes are the optical-illusion costumes that make your kid look like they're riding a horse, dinosaur, ostrich, or pirate ship. The child's legs become the "creature's" legs, dangling fake-rider legs hang on the sides, and the result is the most photographed costume at every Aussie parade — usually photographed by other parents wishing they'd thought of it first. If your...