You must be logged in and verified to contact the designer.
Give the Wheel Walker a gentle nudge and watch it smoothly "walk" across any flat surface. When you're done taking it for a walk, just place it on its side to keep it from walking away. Wheel Walkers can also be stacked one on top of the other. (Note, the surface in the first shot of the video is slightly inclined away from the camera, which is why the Wheel Walker starts rolling without even a nudge.)