Any of the leashes I have came from walmart but years ago and are the old fashion kind made of a navy webbing. I use them as seatbelts in my wagon. The harness goes on the child and the rein is wound through the bars on the wagon sides and I just clip them all in. We used the same process to turn any adult chair into a high chair when our kids were little and for many years for my special needs child that needed support when sitting. It is a good way to allow younger children to "sit" with the other kids but to be a bit off the floor.