Trolls Hopper Ball Outdoor Toy Set - Bundle with 15" Trolls Hopper Ball for Boys and Girls Outdoor Activities, Parties Plus Stickers, More | Trolls Outdoor Toys for Toddlers. This Trolls outdoor toys set includes 1 inflatable Trolls hopper ball that measures 15" when inflated and features cute artwork of favorite Trolls characters. The Hedstrom Hopper ball is the original Hopper. Hedstrom has been making toys like the Hopper Ball since 1913! Quality Hop Balls you can trust come from Hedstrom. This Trolls hopper ball is a great, fun way to get kids active and exercising and are durable enough to use inside or outside. Kids love the fun, colorful graphics featuring favorite Trolls characters. Officially licensed Trolls toys and games set for kids also includes Trolls stickers and a Barn Bots door hanger.