http://cgi.ebay.com/Safety-1st-Tot-A...item45f751ecff
I have used these for about ten years.
I never allow free walking. My kids would comply to my voice commands 999 times in 1000 but that one time out of a thousand they didn't would be the end of my career. I can attach tot a longs to all five walking kids and attach the other end of it to the front, back, and middle of the stroller on each side.
http://www.nanshouse.com/apps/photos...lbumid=7213977
If you look at this album you can see stroller pictures of how I attach the kids to the tot a long and the tot a long to the stroller.