From the box cover:
Picture matching fun with Big Bird & His Friends

Big Bird's got a lot of mail to deliver and he sure could use your help! All your favorite Sesame Street characters are waiting by their mailbox. Spin the spinner and travel around the neighborhood delivering mail, mailing letters in the big blue mailbox, and picking more letters to deliver! Do you have a letter for Elmo, or maybe Ernie? To win, be the first player to deliver all of your letters to your Sesame Street friends!