






🥷 Elevate backyard play to ninja status—because ordinary swings just won’t cut it!
The Slackers 56’ Ninjaline Original Intro Kit is a premium outdoor ninja warrior training set designed for kids aged 5 and up. Featuring a 56-foot, 6000lb tensile strength slackline with 9 interchangeable hanging obstacles, it offers customizable, skill-building challenges. Engineered with heavy-duty steel clips and UV-resistant materials, it ensures safety and durability for backyard, park, or travel use. Lightweight and easy to install, it supports up to 250 pounds, making it perfect for growing ninjas to train balance, agility, and strength.




| ASIN | B074GNG3ML |
| Best Sellers Rank | #1,039,624 in Toys & Games ( See Top 100 in Toys & Games ) #1,593 in Play & Swing Sets |
| Brand | Slackers |
| Color | red |
| Customer Reviews | 4.3 4.3 out of 5 stars (130) |
| Fastener Material | Stainless Steel |
| Fastener Type | Buckle |
| Is Discontinued By Manufacturer | No |
| Item Weight | 12 pounds |
| Item model number | SLA.817 |
| Load Capacity | 250 Pounds |
| Manufacturer | b4Adventure |
| Manufacturer recommended age | 6 - 20 years |
| Material | Nylon |
| Number of Pieces | 2, 3 |
| Product Dimensions | 600"L x 2"W |
| Tensile Strength | 6000 Pounds |
| UPC | 855388005334 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | Passenger Car |
M**.
WOW! This is so great, take anywhere
Once you have all swinging pieces attached it is an easy set up. Works better with 2 people setting up though. The great thing is that you can put up and take down easily, swings stay attached. So you can take it anywhere, beach, camping, kids party, park, etc….
G**N
Perfect for 6 year old ninja in training
Very easy to install. My husband was able to set up by himself but definitely would be easier with two people. Easier than I thought it would be to take slack out. The individual loops make adding obstacles easy and insure they stay spaced apart well. We hung it just above my 6 year olds reach so he can practice anytime he wants. After he has had it a bit longer I think we will hang it a bit higher to make him work a bit harder to use it. It is holding up well to Florida wet weather.
B**H
Good for a specific age group
Our bigger kids enjoy this (12-15). The thing that disappointed me about this ninja line is that it doesn't work very well when you have a wide age range using it at the same time. That's because you have to have it higher for bigger kids because of their height and weight and then little kids can't reach the attachments. We bought a swing for it (not included) thinking that our three year old would then be able to play on it at the same time as the big kids. Unfortunately that didn't work because the swing is too high in the air for him to get on by himself. However, the swing was a huge hit for the older kids! They love bouncing and swinging on it. The other downside is that it's a bit involved to add or move around the attachments. The line has to be taken down or have A LOT of slack in it to add/move attachments. Otherwise we're happy with it and plan to purchase additional attachments.
B**E
Nicely Made, Fit as Expected, Attractive
I think this is a nice ironing board cover and it's pretty much as described and pictured. It fits well, seems to be made well and was easy to put on. There's a velcro strap to create a snug fit if it's loose. I just got it so I haven't used it much. I do wish that it had that silicone coating that my old ironing board cover had. This is just cotton. But it's attractive and so far I think it's great - certainly for the price!
S**E
Slack line great, attachments - not so much
This is a great slack line product set up for attachments to be added. It is easy to install, very sturdy. The attachments are fairly cheap in quality, they are not sturdy, and for serious ninja kids, an upgrade is required. The rings specifically are too thin to hold any significant weight without pain to the hands. We ended up buying a separate ring product, after that it was way more useful. If you use a 56 inch slack line you’re going to need to buy additional pieces anyway because the six provided don’t go very far in length.
K**O
Love this, so does my 9 year old daughter
We purchased every one of these ninja line accessories and line from this company and they are all top quality. Very happy with them and our 9 year old daughter plays on them daily. It's really almost impossible to get her to stop playing on these. This Ninja line is great, very strong. It has 17 buckles to add accessories. Very happy that we purchased the longer 56 ft. line.
M**!
best way for the kids to get outside and have fun
All of my girls and the kids in the neighborhood love this!! I'm so grateful for the safety and fun this enables them all to have.
M**M
Good addition to a play area.
This didn’t really come with installation instructions. It seems self explanatory but a simple diagramed instruction sheet would have been nice. The line is sturdy and I believe it will hold up. My boys are 9,7,4 and they like it but don’t use it near as much as I’d thought, probably because they’re not strong enough and it gets old fast. I had also purchased an extra rope ladder which helped add some interest. In hindsight a zip line might provide just as much fun.
K**L
The ninja line was in original package unopened. Shipped fast.
J**Y
Christmas gift
S**K
Kids love it, install of the accessories are a pain though
E**N
Seems like good quality but it does not include the training line
Trustpilot
1 month ago
5 days ago