You win need three colors of yarn for the body, belly, and eyes. Also a tiny bit of stuffing. The head with eye sockets, body and arms are crocheted, then the belly is crocheted separate. The belly is sewn to the body along the bottom with the legs. Then the other sides of the belly are sewn to the body using a simple stitch. Eyes are sewn into the sockets last.

https://youtu.be/oFo8lPmmxMU?is=Pqt8gIJGebiSH8Um