TCOA DOG TORNADO GAME Renowned Swedish animal behaviorist NINA OTTOSSON is the creator and designer of the ORIGINAL Interactive pet puzzle games. Her games are distributed exclusively in the U.S. by The Company Of Animals. The idea behind the 'DOG TORNADO' is for the dog to dislodge the removable bones, then turn the revolving sections to reveal hidden treats. The 'DOG TORNADO' has many variables to increase the level of difficulty as the dog's skill improves. With a little practice, the pet will quickly learn to dislodge the bones and turn the Tornado to access the rewards. Made of strong plastic for durability and ease of cleaning.