Track Shoes

http://www.google.com/patents/about?id=gyNoAAAAEBAJ

With these special soles, patented by the United Shoe Machinery Corp. in 1968, you can leave animal tracks in natural surroundings, “for the purpose of serious instruction or for games and amusement.”

The tracks shown here match those of a Kodiak bear cub. So now you can have an anxious mother bear follow you through the woods. Good, right?