Since this site doesn't tell you how to make it, I decided to show any that were interested how we made our swings. So here goes.
We found these skate board bases online at Amazon.com. They were $18.00 each. Since we have two girls we decided that we should make two. Ok, I decided that Chris should make two.
My little helper.
The eye lags were placed 10 inches apart on either side of the support beam of our granny unit. Then the carabiners were attached. The rope from each side of the swing was threaded through and the wire clamps were put on the rope.
Easy enough for 3 year olds to swing on it.