Here is the video of Forrest using some toys to help motivate proper heel position and lots(!!) of focus on the handler. This will show you the use of the magnet ball as a training device. If you decide you want one, please let me know and I'll get you one when I place my order. E-mail me and I'll let you know what I find in the way of the best price--figure around $40.00, but I'm not positive.