The interactive flap sensor activated greeting card of the present invention contains an audio module and a series of “window flaps” across the inside of the greeting card. When the greeting card is opened, a short audio prompt instructs the user to open a series of flaps inside the card to hear further audio messages or sound clips that correlate with the art work inside the card. When each flap is opened, a different audio file is played. The sound module is programmed to react to the card opening and then to trigger additional individual sounds each time one of the flaps of the card is opened. In another embodiment, the greeting card contains a series of flaps wherein opening one flap reveals another flap, and so on. Once the last flap is opened, a short audio recording is activated.