I Spy Bingo is a bingo game based on the 'I Spy' picture books by Walter Wick and Jean Marzollo. The bingo boards (4 space by 4 space) are double-sided - one side with the letters in sequence for beginning players and the reverse side with randomly arranged letters. Each bingo card square contains pictures of objects beginning with the letter in the square. The letter cards are also two-sided - the beginner's side features the letter to be called out, and the "advanced" side only contains pictures whose names are to be called out and the first letter of the word used. Per the game box, ages 4+ are appropriate for the game. From the game box: "Popular I Spy pictures become a fast and fun bingo game...get 4 in a row and shout Bingo! * Players learn beginning sounds and practice reading skills. * Promotes manual dexterity, verbal and visual skills. * Two levels of play."