A reversible toy has a main body. The main body has a first configured unit and a second configured unit joined with each other. Each of the first and the second configured units is made of elastomer. One of the first and the second configured units is filled in the other one of the first and the second configured units to form a reversible opening formed in a bottom of the main body, and positions of the first and the second configured units are interchangeable via the reversible opening.