Bobcat
The Bobcat badge is the first badge that is earned by all Scouts, regardless of what grade they first began Cub Scouts. This badge is required for all scouts because it involves learning the Scout Oath, the Scout Law, the Cub Scout motto, slogan, handshake, and sign.
Completion of this badge gives the Scout the right to wear the Bobcat patch on his uniform and the right to proceed to his next rank (which will vary based upon age.)