Board book, with electronic sounds activated when flaps are lifted Board book, with electronic sounds and foil mirror. Board book, with electronic sound module attached to inside back cover Board book with electronic sounds from panel attached to extended back cover Shaped board book, with electronic sound attached to inside back cover. Board book with electronic sounds from panel attached to extended back cover. Board book with electronic sounds, on plastic panel attached to extended back cover Board book with electronic sound effects from panel attached to back cover Board book with electronic sounds from plastic panel attached to extended back cover Board book with electronic sound module attached to inside of extended rear cover