Turn your backyard into an adventure park. Slacklines are one of the most exciting new items that you can put in your backyard for hours and hours of enjoyment. Slacklines help improve core strength, and balance all while walking just a few feet off the ground.  The Slackers slackline kit comes with 2 sets of 50' lines to attach between two trees. The first line is 2" wide and used for the walking.The second "teaching line" line is set up above the person to help a person to reach up and grab while learning to balance themselves. Ages 7 & up.