10 Best Slackline Ninja Line 2025 in the United States

The Hyponix Ninja Obstacle Course offers a complete setup for kids aged 5 and up who enjoy active outdoor play. It includes two 60-foot slacklines made from weatherproof, UV-resistant materials and reinforced nylon ropes, making it durable for year-round backyard use. The obstacle course features 13 different challenges like monkey nets, rings, and climbing ropes, all easily adjustable with steel carabiners and a ratchet-tight tensioning system for quick and secure setup.

Supporting up to 880 pounds, it’s strong enough for multiple kids to play safely at once. While the course is fairly lightweight at 25 pounds and compactly packaged for storage, it requires two sturdy anchor points to set up properly, such as trees or poles. This product is ideal for families looking to encourage physical activity, balance, and coordination in children, especially those who enjoy ninja-style or obstacle course play.

It may not suit very young toddlers without supervision, and those without suitable outdoor space might find it challenging to install. This versatile, well-built ninja line set brings both fun and fitness into kids’ outdoor routines.

The Double Ninja Slackline Obstacle Course by Lily's Things offers a fun and challenging outdoor activity for kids. At 110 feet in length, it’s suitable for trees spaced up to 50 feet apart. The unique double-line design provides extra stability and minimizes sagging and twisting, which enhances safety and usability. This set includes a variety of obstacles like monkey bars, a climbing rope, ninja rings, a trapeze swing bar, and a rickety bridge, making it versatile and exciting for kids over five years old.

The weight capacity is 250 pounds, and it's made from industrial-grade materials such as stainless steel and polypropylene, ensuring durability and safety. Adjustability is another big plus, as you can customize the placement and distance of the obstacles according to your setup and preferences. However, the item is quite heavy at 30.8 pounds, making it less portable than some other options on the market.

Additionally, it’s relatively pricey and might not fit everyone’s budget. This slackline kit could be an excellent choice for families looking to encourage outdoor physical activities and build a backyard ninja warrior course, provided they have the budget and space to accommodate it.

The Double Ninja Slackline Obstacle Course by Lily's Things is a fun and challenging setup designed for kids to build strength and coordination with ninja-style obstacles. It features two parallel slacklines stretching 80 feet, made from strong alloy steel with stainless steel fasteners for durability and safety. The dual-line design reduces bounce and twisting, making it more stable for young users compared to a single slackline. It supports up to 1000 pounds, so it’s sturdy enough for multiple kids or adults to use safely.

The course includes exciting accessories like monkey bars, climbing ropes, ninja rings, a trapeze swing bar, and a unique rickety bridge that adds a fun wobble challenge. It fits trees spaced 15 to 35 feet apart, and the tensioning system is adjustable to customize obstacle positions based on your setup. Weighing about 30 pounds, it’s relatively portable but does require solid anchor points (like trees), so it’s best suited for outdoor use.

The width is a slim 3 inches, which might be a little tricky for very young children just starting out. While assembly isn’t overly complicated, it might take some time to set up securely. This obstacle course is an excellent option for active kids aged 5 and up who enjoy adventurous outdoor play and want a safe, well-made ninja setup that grows with their skills.