Rubber Bear
A bear made of rubber, a guest at Ozma's birthday feast who cannot eat but bounces himself all around the room.
First named in The Road to Oz, ch. 23
At other places sat the Hungry Tiger, the Cowardly Lion, the Saw-Horse, the Rubber Bear
What the books say it is
made of rubber 1 chapter
At other places sat the Hungry Tiger, the Cowardly Lion, the Saw-Horse, the Rubber Bear, the Fox King and the Donkey King; they made quite a company of animals.
The Road to Oz, ch. 23