DIY How to make a fun Zip-Line for kids really cheap and reliable. Easy project.

Here I would like to show you my idea on making a Zip-Line for kids for about $10. Now, the bogie is about $10 if you need the whole system it is about $65 and I describe it. The system is safe, we had it in our yard for 2 years it works just fine. I used it myself and it held to my weight over 180lb multiple times. From your comments about safety I feel that I must add a disclaimer: #1 You have to evaluate your safety level and do this project AT YOUR OWN RISK #2 My zipline at home is ONLY about 40 feet long Between 2 trees and soft grass on the bottom #3 All materials are metal not plastic and designed for about 50-80 pounds kids