A dog toy can be as simple as a chunk of hard maple.
A good dog toy can be as simple as an empty juice bottle. Bonus: it crackles and crumples most satisfyingly.
Two hallmarks of of flatland scenery. The eye, mind, and spirit can feast on the simplicity and immensity of the landscape.
Stella does not need a fancy-dancy toy from PetSmart. She found a paper towel core brought home from work, with all kinds of interesting odors coating its rough surface, very interesting. It was fascinating to watch her get involved, tossing it, batting it with a paw, things she normally does not do. After she lost interest I picked it up and put it away, to be re-introduced at a later date.
Sometimes the best toys are simple ones, disguised as everyday run-of-the-mill objects.