Get the kids away from the electronics and out in the fresh air by installing a tire swing in your backyard. Tire swings have been around forever because they’re fun for any age and they're inexpensive to make.
Cross one end over the other, make a loop and tuck the end inside the loop.
Be sure to tighten the knot so that both ends of the rope are adjacent and parallel to each other.
Finish off the open ends of the rope by tying an overhand knot (just a simple loop, then feeding the end of the rope through) as a stopgap. Be sure to tighten the knot so that both ends of the rope are adjacent and parallel to each other.
While not absolutely necessary, you can use that same knot on both the branch and the tire. Adjust the rope length and knots to set the tire swing height as desired. A good rule of thumb is to set the bottom of the tire at least 12 to 18 inches from the ground.
To avoid fraying, you can try burning the end of the rope (be careful and prepared to extinguish a flame) or wrap the ends of the rope with exterior duct tape.
After hanging the tire swing, drill drainage holes in the bottom of the tire to keep water from collecting inside the tire, creating a breeding ground for mosquitoes (and a big sloshy surprise when someone gets on the tire). Also make sure to periodically check the inside of the tire for wasp nests.